Ubuntu Security Advisories

Andrew Lacambra discovered that Rack did not properly parse certain regular expressions. An attacker could possibly use this issue to bypass network security filters. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-26961) William T. Nelson discovered that Rack did not handle multipart headers correctly. An attacker could possibly use this issue to cause downstream parsing issues or a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-26962) It was discovered that Rack did not handle the Forwarded header correctly. An attacker could possibly use this issue to manipulate header values. This issue only affected Ubuntu 25.10. (CVE-2026-32762) It was discovered that Rack could consume excessive CPU when handling certain Accept-Encoding values. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-34230) Haruki Oyama discovered that certain configurations of Rack could erroneously fail to derive the displayed directory path, and expose the full filesystem path. An attacker could possibly use this issue to disclose deployment details such as layout and usernames. (CVE-2026-34763) It was discovered that Rack did not properly handle static file paths. An attacker could possibly use this issue to exfiltrate unintentionally served data. (CVE-2026-34785) Haruki Oyama discovered that Rack did not apply header rules to certain requests for URL-encoded static paths. An attacker could possibly use this issue to bypass security-relevant response headers. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34786) It was discovered that Rack did not limit the number of ranges requested in the Range header. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34826) It was discovered that Rack could consume excessive CPU when parsing certain multipart parameters. An attacker could possibly use this to cause a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-34827) It was discovered that Rack could consume unbounded disk space when handling requests without a Content-Length header. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34829) Mehtab Zafar discovered that Rack directly interpreted the X-Accel-Mapping header as a regular expression without escaping. An attacker could possibly use this issue to exfiltrate arbitrary files from internal locations. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34830) It was discovered that Rack did not properly handle messages with Unicode. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34831) It was discovered that Rack did not properly parse the Host header. An attacker could possibly use this issue to bypass security filters or poison generated links. This issue only affected Ubuntu 25.10. (CVE-2026-34835)

Jaroslav Lobačevski discovered that ESAPI incorrectly validated directory paths during path verification. An attacker could possibly use this issue to bypass directory validation checks, leading to control-flow bypass. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-23457) Kevin W. Wall and Sebastian Passaro discovered that ESAPI did not properly sanitize javascript URLs because of an incorrect regular expression. An attacker could possibly use this issue to perform a cross-site scripting attack. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-24891) Longlong Gong discovered that ESAPI did not properly neutralize special elements during SQL injection defense. A remote attacker could possibly use this issue to perform SQL injection. (CVE-2025-5878)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - Netfilter; - Network traffic control; (CVE-2026-23060, CVE-2026-23074, CVE-2026-23111)

It was discovered that oFono incorrectly handled crafted responses from AT commands. An attacker could possibly use this issue to crash the program, resulting in a denial of service or arbitrary code execution. (CVE-2024-7538, CVE-2024-7539, CVE-2024-7540, CVE-2024-7541, CVE-2024-7542) Lucas Leong discovered that oFono incorrectly handled crafted input. An attacker could possibly use this issue to crash the program, resulting in a denial of service or arbitrary code execution. (CVE-2024-7543, CVE-2024-7544, CVE-2024-7545, CVE-2024-7546, CVE-2024-7547)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Block layer subsystem; - Drivers core; - Bluetooth drivers; - DMA engine subsystem; - GPU drivers; - HID subsystem; - Intel Trace Hub HW tracing drivers; - IIO ADC drivers; - IRQ chip drivers; - Modular ISDN driver; - LED subsystem; - UACCE accelerator framework; - Ethernet bonding driver; - Network drivers; - STMicroelectronics network drivers; - Ethernet team driver; - NVME drivers; - PHY drivers; - SLIMbus drivers; - W1 Dallas's 1-wire bus driver; - Xen hypervisor drivers; - BTRFS file system; - Ext4 file system; - Network file system (NFS) client; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - NFC subsystem; - BPF subsystem; - IRQ subsystem; - Memory management; - Bluetooth subsystem; - CAN network layer; - Networking core; - IPv4 networking; - IPv6 networking; - L2TP protocol; - NET/ROM layer; - Network traffic control; - SCTP protocol; - TLS protocol; - XFRM subsystem; - Creative Sound Blaster X-Fi driver; - USB sound devices; (CVE-2023-53421, CVE-2023-53520, CVE-2023-53662, CVE-2023-54207, CVE-2025-38057, CVE-2025-38125, CVE-2025-38232, CVE-2025-38408, CVE-2025-38591, CVE-2025-40149, CVE-2025-40164, CVE-2025-68211, CVE-2025-68340, CVE-2025-68365, CVE-2025-68725, CVE-2025-68817, CVE-2025-71162, CVE-2025-71163, CVE-2025-71185, CVE-2025-71186, CVE-2025-71188, CVE-2025-71190, CVE-2025-71191, CVE-2025-71194, CVE-2025-71196, CVE-2025-71197, CVE-2025-71199, CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23001, CVE-2026-23003, CVE-2026-23011, CVE-2026-23026, CVE-2026-23033, CVE-2026-23037, CVE-2026-23038, CVE-2026-23049, CVE-2026-23056, CVE-2026-23058, CVE-2026-23061, CVE-2026-23063, CVE-2026-23064, CVE-2026-23071, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23078, CVE-2026-23080, CVE-2026-23083, CVE-2026-23084, CVE-2026-23085, CVE-2026-23087, CVE-2026-23089, CVE-2026-23090, CVE-2026-23091, CVE-2026-23093, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097, CVE-2026-23098, CVE-2026-23099, CVE-2026-23101, CVE-2026-23103, CVE-2026-23105, CVE-2026-23108, CVE-2026-23119, CVE-2026-23120, CVE-2026-23121, CVE-2026-23124, CVE-2026-23125, CVE-2026-23128, CVE-2026-23133, CVE-2026-23145, CVE-2026-23146, CVE-2026-23150, CVE-2026-23164, CVE-2026-23167, CVE-2026-23170, CVE-2026-23209)

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcode causing loss of integrity and confidentiality. (CVE-2024-36347) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - MIPS architecture; - PowerPC architecture; - x86 architecture; - Block layer subsystem; - Cryptographic API; - ACPI drivers; - Network block device driver; - Bluetooth drivers; - Character device driver; - TPM device driver; - Clock framework and drivers; - Data acquisition framework and drivers; - Hardware crypto device drivers; - GPU drivers; - Hardware monitoring drivers; - InfiniBand drivers; - Input Device core drivers; - IOMMU subsystem; - IRQ chip drivers; - Macintosh device drivers; - Multiple devices driver; - Media drivers; - Network drivers; - Mellanox network drivers; - STMicroelectronics network drivers; - Ethernet team driver; - MediaTek network drivers; - NVME drivers; - PA-RISC drivers; - Chrome hardware platform drivers; - x86 platform drivers; - Voltage and Current Regulator drivers; - SCSI subsystem; - SPI subsystem; - Media Oriented Systems Transport (MOST) driver; - Realtek RTL8723BS SDIO drivers; - TCM subsystem; - USB Host Controller drivers; - USB Type-C Connector System Software Interface driver; - Backlight driver; - Watchdog drivers; - BFS file system; - BTRFS file system; - Ext4 file system; - F2FS file system; - FUSE (File system in Userspace); - HFS+ file system; - File systems infrastructure; - Journaling layer for block devices (JBD2); - Network file system (NFS) client; - File system notification infrastructure; - NTFS3 file system; - OCFS2 file system; - SMB network file system; - BPF subsystem; - Ethernet bridge; - io_uring subsystem; - Locking primitives; - Scheduler infrastructure; - Shadow Call Stack mechanism; - Tracing infrastructure; - Memory management; - CAIF protocol; - Ceph Core library; - Networking core; - Ethtool driver; - Handshake API; - HSR network protocol; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - Multipath TCP; - Netfilter; - NET/ROM layer; - NFC subsystem; - Open vSwitch; - Rose network layer; - Network traffic control; - Network sockets; - Sun RPC protocol; - Integrity Measurement Architecture(IMA) framework; - Key management; - Simplified Mandatory Access Control Kernel framework; - FireWire sound drivers; - HD-audio driver; - Turtle Beach Wavefront ALSA driver; - STMicroelectronics SoC drivers; - USB sound devices; - KVM subsystem; (CVE-2024-57795, CVE-2025-22022, CVE-2025-22111, CVE-2025-38022, CVE-2025-38234, CVE-2025-40164, CVE-2025-40325, CVE-2025-68206, CVE-2025-68254, CVE-2025-68255, CVE-2025-68256, CVE-2025-68257, CVE-2025-68258, CVE-2025-68259, CVE-2025-68261, CVE-2025-68263, CVE-2025-68264, CVE-2025-68265, CVE-2025-68266, CVE-2025-68291, CVE-2025-68325, CVE-2025-68332, CVE-2025-68335, CVE-2025-68336, CVE-2025-68337, CVE-2025-68344, CVE-2025-68345, CVE-2025-68346, CVE-2025-68347, CVE-2025-68349, CVE-2025-68354, CVE-2025-68362, CVE-2025-68363, CVE-2025-68364, CVE-2025-68366, CVE-2025-68367, CVE-2025-68369, CVE-2025-68371, CVE-2025-68372, CVE-2025-68374, CVE-2025-68378, CVE-2025-68379, CVE-2025-68380, CVE-2025-68724, CVE-2025-68727, CVE-2025-68728, CVE-2025-68732, CVE-2025-68733, CVE-2025-68740, CVE-2025-68741, CVE-2025-68742, CVE-2025-68744, CVE-2025-68746, CVE-2025-68753, CVE-2025-68755, CVE-2025-68756, CVE-2025-68757, CVE-2025-68758, CVE-2025-68759, CVE-2025-68763, CVE-2025-68764, CVE-2025-68765, CVE-2025-68766, CVE-2025-68767, CVE-2025-68769, CVE-2025-68770, CVE-2025-68771, CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775, CVE-2025-68776, CVE-2025-68777, CVE-2025-68778, CVE-2025-68780, CVE-2025-68782, CVE-2025-68783, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787, CVE-2025-68788, CVE-2025-68794, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797, CVE-2025-68798, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68804, CVE-2025-68806, CVE-2025-68808, CVE-2025-68809, CVE-2025-68810, CVE-2025-68811, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816, CVE-2025-68817, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-68821, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067, CVE-2025-71068, CVE-2025-71069, CVE-2025-71071, CVE-2025-71072, CVE-2025-71075, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71081, CVE-2025-71082, CVE-2025-71083, CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71088, CVE-2025-71089, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71095, CVE-2025-71096, CVE-2025-71097, CVE-2025-71098, CVE-2025-71101, CVE-2025-71102, CVE-2025-71104, CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109, CVE-2025-71111, CVE-2025-71112, CVE-2025-71113, CVE-2025-71114, CVE-2025-71116, CVE-2025-71118, CVE-2025-71119, CVE-2025-71120, CVE-2025-71121, CVE-2025-71122, CVE-2025-71123, CVE-2025-71125, CVE-2025-71126, CVE-2025-71127, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132, CVE-2025-71133, CVE-2025-71135, CVE-2025-71136, CVE-2025-71137, CVE-2025-71138, CVE-2025-71140, CVE-2025-71141, CVE-2025-71143, CVE-2025-71144, CVE-2025-71147, CVE-2025-71148, CVE-2025-71149, CVE-2025-71150, CVE-2025-71151, CVE-2025-71153, CVE-2025-71154, CVE-2026-23209)

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcode causing loss of integrity and confidentiality. (CVE-2024-36347) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - MIPS architecture; - PowerPC architecture; - User-Mode Linux (UML); - x86 architecture; - Block layer subsystem; - Cryptographic API; - ACPI drivers; - Ublk userspace block driver; - Bluetooth drivers; - Character device driver; - TPM device driver; - Clock framework and drivers; - GPU drivers; - Hardware monitoring drivers; - Intel Trace Hub HW tracing drivers; - InfiniBand drivers; - Input Device core drivers; - Input Device (Mouse) drivers; - IOMMU subsystem; - Multiple devices driver; - Media drivers; - Network drivers; - Mellanox network drivers; - STMicroelectronics network drivers; - Ethernet team driver; - PA-RISC drivers; - Chrome hardware platform drivers; - x86 platform drivers; - SCSI subsystem; - SPI subsystem; - TCM subsystem; - Freescale USB OTG Transceiver Driver; - USB Type-C Connector System Software Interface driver; - Watchdog drivers; - BTRFS file system; - exFAT file system; - Ext4 file system; - F2FS file system; - FUSE (File system in Userspace); - HFS+ file system; - File systems infrastructure; - Network file system (NFS) server daemon; - File system notification infrastructure; - NTFS3 file system; - OCFS2 file system; - SMB network file system; - XFS file system; - User-space API (UAPI); - io_uring subsystem; - Scheduler infrastructure; - Shadow Call Stack mechanism; - Tracing infrastructure; - Memory management; - BPF subsystem; - CAIF protocol; - Ceph Core library; - Networking core; - Ethtool driver; - Handshake API; - HSR network protocol; - IPv4 networking; - IPv6 networking; - Multipath TCP; - Netfilter; - NET/ROM layer; - NFC subsystem; - Open vSwitch; - Rose network layer; - Network traffic control; - Sun RPC protocol; - Key management; - Landlock security; - STMicroelectronics SoC drivers; - USB sound devices; - KVM subsystem; (CVE-2025-68351, CVE-2025-68353, CVE-2025-68365, CVE-2025-68368, CVE-2025-68725, CVE-2025-68736, CVE-2025-68745, CVE-2025-68767, CVE-2025-68768, CVE-2025-68769, CVE-2025-68770, CVE-2025-68771, CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775, CVE-2025-68776, CVE-2025-68777, CVE-2025-68778, CVE-2025-68780, CVE-2025-68781, CVE-2025-68782, CVE-2025-68783, CVE-2025-68784, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787, CVE-2025-68788, CVE-2025-68791, CVE-2025-68792, CVE-2025-68793, CVE-2025-68794, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797, CVE-2025-68798, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68802, CVE-2025-68803, CVE-2025-68804, CVE-2025-68805, CVE-2025-68806, CVE-2025-68807, CVE-2025-68808, CVE-2025-68809, CVE-2025-68810, CVE-2025-68811, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816, CVE-2025-68817, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-68821, CVE-2025-68822, CVE-2025-68823, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067, CVE-2025-71068, CVE-2025-71069, CVE-2025-71070, CVE-2025-71071, CVE-2025-71072, CVE-2025-71073, CVE-2025-71075, CVE-2025-71076, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71080, CVE-2025-71081, CVE-2025-71082, CVE-2025-71083, CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71089, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71095, CVE-2025-71096, CVE-2025-71097, CVE-2025-71098, CVE-2025-71099, CVE-2025-71100, CVE-2025-71101, CVE-2025-71102, CVE-2025-71104, CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109, CVE-2025-71111, CVE-2025-71112, CVE-2025-71113, CVE-2025-71114, CVE-2025-71115, CVE-2025-71116, CVE-2025-71117, CVE-2025-71118, CVE-2025-71119, CVE-2025-71120, CVE-2025-71121, CVE-2025-71122, CVE-2025-71123, CVE-2025-71124, CVE-2025-71125, CVE-2025-71126, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132, CVE-2025-71133, CVE-2025-71135, CVE-2025-71136, CVE-2025-71137, CVE-2025-71138, CVE-2025-71140, CVE-2025-71143, CVE-2025-71146, CVE-2025-71147, CVE-2025-71148, CVE-2025-71149, CVE-2025-71150, CVE-2025-71151, CVE-2025-71153, CVE-2025-71154, CVE-2025-71156, CVE-2025-71157, CVE-2026-23091, CVE-2026-23209)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Cryptographic API; - UDF file system; - NFC subsystem; - Network traffic control; (CVE-2024-46777, CVE-2025-21735, CVE-2025-37849, CVE-2026-23060, CVE-2026-23074)

Ludvig Pedersen discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-33116, CVE-2026-26171) Ludvig Pedersen and Kevin Jones discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-32203) Ludvig Pedersen discovered that the System.Net.Mail component in .NET incorrectly handled certain inputs. An attacker could possibly use this issue to perform a network spoofing attack. (CVE-2026-32178)

It was discovered that FRR did not correctly handle certain network requests. A remote attacker could possibly use this issue to gain unauthorized access to resources.

USN-8138-1 fixed a vulnerability in tar-rs. This update provides the corresponding update for Ubuntu 20.04 LTS. Original advisory details: It was discovered that tar-rs incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could use this issue to modify permissions of arbitrary directories outside the extraction root, and possibly escalate privileges.

USN-8168-1 fixed a vulnerability in Rust. This update provides the corresponding update to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that tar-rs embedded in rustc incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could use this issue to modify permissions of arbitrary directories outside the extraction root, and possibly escalate privileges.

It was discovered that XML::Parser incorrectly handled certain multi-byte UTF-8 characters. If a user or automated system were tricked into processing specially crafted XML data, a remote attacker could use this issue to cause XML::Parser to crash, resulting in a denial of service or to possibly execute arbitrary code. (CVE-2006-10002) It was discovered that XML::Parser incorrectly handled very deep element nesting. If a user or automated system were tricked into processing specially crafted XML data, a remote attacker could use this issue to cause XML::Parser to crash, resulting in a denial of service or to possibly execute arbitrary code (CVE-2006-10003)

It was discovered that polkit incorrectly handled nested elements in XML policy files. If an administrator were tricked into installing a malicious policy file, a remote attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2025-7519) Pavel Kohout discovered that the polkit polkit-agent-helper-1 utility incorrectly handled long input. A local attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2026-4897)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - Netfilter; - Network traffic control; (CVE-2026-23060, CVE-2026-23074, CVE-2026-23111)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - Netfilter; - Network traffic control; (CVE-2026-23060, CVE-2026-23074, CVE-2026-23111)

Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM). An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853, CVE-2026-23268, CVE-2026-23269, CVE-2026-23403, CVE-2026-23404, CVE-2026-23405, CVE-2026-23406, CVE-2026-23407, CVE-2026-23408, CVE-2026-23409, CVE-2026-23410, CVE-2026-23411) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Nios II architecture; - PowerPC architecture; - Sun Sparc architecture; - User-Mode Linux (UML); - x86 architecture; - Block layer subsystem; - Cryptographic API; - ACPI drivers; - ATM drivers; - Drivers core; - Network block device driver; - Bluetooth drivers; - Bus devices; - Character device driver; - Hardware random number generator core; - TPM device driver; - Data acquisition framework and drivers; - Counter interface drivers; - CPU frequency scaling framework; - DMA engine subsystem; - Intel Stratix 10 firmware drivers; - GPU drivers; - HID subsystem; - Hardware monitoring drivers; - CoreSight HW tracing drivers; - IIO subsystem; - InfiniBand drivers; - Input Device core drivers; - Input Device (Miscellaneous) drivers; - Input Device (Tablet) drivers; - ISDN/mISDN subsystem; - Macintosh device drivers; - Multiple devices driver; - Media drivers; - MOST (Media Oriented Systems Transport) drivers; - MTD block device drivers; - Network drivers; - Mellanox network drivers; - Texas Instruments network drivers; - Ethernet team driver; - MediaTek network drivers; - NVME drivers; - PA-RISC drivers; - PCI subsystem; - Performance monitor drivers; - Pin controllers subsystem; - Chrome hardware platform drivers; - x86 platform drivers; - ARM PM domains; - PPS (Pulse Per Second) driver; - PWM drivers; - Voltage and Current Regulator drivers; - S/390 drivers; - SCSI subsystem; - Texas Instruments SoC drivers; - SPI subsystem; - Realtek RTL8723BS SDIO drivers; - TCM subsystem; - Userspace I/O drivers; - Cadence USB3 driver; - DesignWare USB3 driver; - USB Gadget drivers; - USB Host Controller drivers; - Renesas USBHS Controller drivers; - USB Mass Storage drivers; - USB Type-C Connector System Software Interface driver; - Backlight driver; - Framebuffer layer; - Watchdog drivers; - BFS file system; - BTRFS file system; - File systems infrastructure; - Ext4 file system; - F2FS file system; - FUSE (File system in Userspace); - HFS file system; - HFS+ file system; - HugeTLB file system; - Journaling layer for block devices (JBD2); - JFS file system; - Network file system (NFS) client; - Network file system (NFS) server daemon; - File system notification infrastructure; - NTFS3 file system; - OCFS2 file system; - OrangeFS file system; - Proc file system; - SMB network file system; - SquashFS file system; - UDF file system; - XFS file system; - BPF subsystem; - Ethernet bridge; - Memory management; - padata parallel execution mechanism; - IP tunnels definitions; - Network traffic control; - Network sockets; - XFRM subsystem; - io_uring subsystem; - Control group (cgroup); - Locking primitives; - Padata parallel execution mechanism; - PID allocator; - Scheduler infrastructure; - Shadow Call Stack mechanism; - Tracing infrastructure; - 9P file system network protocol; - Bluetooth subsystem; - CAIF protocol; - CAN network layer; - Ceph Core library; - Networking core; - Ethtool driver; - HSR network protocol; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - Multipath TCP; - Netfilter; - NET/ROM layer; - NFC subsystem; - Open vSwitch; - RF switch subsystem; - Rose network layer; - SCTP protocol; - Sun RPC protocol; - TIPC protocol; - Unix domain sockets; - VMware vSockets driver; - Wireless networking; - Rust bindings mechanism; - Integrity Measurement Architecture(IMA) framework; - Key management; - Simplified Mandatory Access Control Kernel framework; - FireWire sound drivers; - Turtle Beach Wavefront ALSA driver; - Intel ASoC drivers; - STMicroelectronics SoC drivers; - USB sound devices; (CVE-2022-49465, CVE-2022-49635, CVE-2023-53041, CVE-2024-36903, CVE-2024-36927, CVE-2024-37354, CVE-2024-41014, CVE-2024-46830, CVE-2024-47666, CVE-2024-49968, CVE-2024-53114, CVE-2024-56538, CVE-2024-58011, CVE-2025-21780, CVE-2025-21861, CVE-2025-22022, CVE-2025-22058, CVE-2025-22111, CVE-2025-22121, CVE-2025-23143, CVE-2025-37849, CVE-2025-38022, CVE-2025-38129, CVE-2025-38236, CVE-2025-38248, CVE-2025-38556, CVE-2025-38584, CVE-2025-39869, CVE-2025-39873, CVE-2025-39876, CVE-2025-39880, CVE-2025-39883, CVE-2025-39885, CVE-2025-39907, CVE-2025-39911, CVE-2025-39913, CVE-2025-39923, CVE-2025-39934, CVE-2025-39937, CVE-2025-39943, CVE-2025-39945, CVE-2025-39949, CVE-2025-39951, CVE-2025-39953, CVE-2025-39955, CVE-2025-39967, CVE-2025-39968, CVE-2025-39969, CVE-2025-39970, CVE-2025-39971, CVE-2025-39972, CVE-2025-39973, CVE-2025-39980, CVE-2025-39985, CVE-2025-39986, CVE-2025-39987, CVE-2025-39988, CVE-2025-39994, CVE-2025-39995, CVE-2025-39996, CVE-2025-39998, CVE-2025-40001, CVE-2025-40006, CVE-2025-40011, CVE-2025-40020, CVE-2025-40021, CVE-2025-40026, CVE-2025-40027, CVE-2025-40029, CVE-2025-40030, CVE-2025-40035, CVE-2025-40040, CVE-2025-40042, CVE-2025-40043, CVE-2025-40044, CVE-2025-40048, CVE-2025-40049, CVE-2025-40053, CVE-2025-40055, CVE-2025-40060, CVE-2025-40068, CVE-2025-40070, CVE-2025-40078, CVE-2025-40081, CVE-2025-40083, CVE-2025-40085, CVE-2025-40087, CVE-2025-40088, CVE-2025-40092, CVE-2025-40094, CVE-2025-40105, CVE-2025-40106, CVE-2025-40109, CVE-2025-40110, CVE-2025-40111, CVE-2025-40112, CVE-2025-40115, CVE-2025-40116, CVE-2025-40118, CVE-2025-40120, CVE-2025-40121, CVE-2025-40124, CVE-2025-40125, CVE-2025-40126, CVE-2025-40127, CVE-2025-40134, CVE-2025-40140, CVE-2025-40153, CVE-2025-40154, CVE-2025-40167, CVE-2025-40171, CVE-2025-40173, CVE-2025-40178, CVE-2025-40179, CVE-2025-40183, CVE-2025-40187, CVE-2025-40188, CVE-2025-40194, CVE-2025-40200, CVE-2025-40204, CVE-2025-40205, CVE-2025-40211, CVE-2025-40215, CVE-2025-40219, CVE-2025-40220, CVE-2025-40223, CVE-2025-40231, CVE-2025-40233, CVE-2025-40240, CVE-2025-40243, CVE-2025-40244, CVE-2025-40245, CVE-2025-40248, CVE-2025-40252, CVE-2025-40253, CVE-2025-40254, CVE-2025-40257, CVE-2025-40258, CVE-2025-40259, CVE-2025-40261, CVE-2025-40262, CVE-2025-40263, CVE-2025-40264, CVE-2025-40269, CVE-2025-40271, CVE-2025-40272, CVE-2025-40273, CVE-2025-40275, CVE-2025-40277, CVE-2025-40278, CVE-2025-40279, CVE-2025-40280, CVE-2025-40281, CVE-2025-40282, CVE-2025-40283, CVE-2025-40304, CVE-2025-40306, CVE-2025-40308, CVE-2025-40309, CVE-2025-40312, CVE-2025-40313, CVE-2025-40314, CVE-2025-40315, CVE-2025-40317, CVE-2025-40319, CVE-2025-40321, CVE-2025-40322, CVE-2025-40324, CVE-2025-40331, CVE-2025-40342, CVE-2025-40343, CVE-2025-40345, CVE-2025-40346, CVE-2025-40349, CVE-2025-40351, CVE-2025-40360, CVE-2025-40363, CVE-2025-68168, CVE-2025-68176, CVE-2025-68177, CVE-2025-68185, CVE-2025-68191, CVE-2025-68192, CVE-2025-68194, CVE-2025-68200, CVE-2025-68204, CVE-2025-68217, CVE-2025-68220, CVE-2025-68227, CVE-2025-68229, CVE-2025-68238, CVE-2025-68241, CVE-2025-68244, CVE-2025-68245, CVE-2025-68249, CVE-2025-68254, CVE-2025-68255, CVE-2025-68257, CVE-2025-68258, CVE-2025-68261, CVE-2025-68264, CVE-2025-68266, CVE-2025-68282, CVE-2025-68284, CVE-2025-68285, CVE-2025-68286, CVE-2025-68287, CVE-2025-68288, CVE-2025-68289, CVE-2025-68290, CVE-2025-68295, CVE-2025-68301, CVE-2025-68302, CVE-2025-68303, CVE-2025-68308, CVE-2025-68312, CVE-2025-68321, CVE-2025-68325, CVE-2025-68327, CVE-2025-68328, CVE-2025-68330, CVE-2025-68331, CVE-2025-68332, CVE-2025-68335, CVE-2025-68336, CVE-2025-68337, CVE-2025-68339, CVE-2025-68344, CVE-2025-68346, CVE-2025-68349, CVE-2025-68354, CVE-2025-68362, CVE-2025-68364, CVE-2025-68366, CVE-2025-68367, CVE-2025-68372, CVE-2025-68724, CVE-2025-68727, CVE-2025-68728, CVE-2025-68732, CVE-2025-68733, CVE-2025-68734, CVE-2025-68740, CVE-2025-68746, CVE-2025-68757, CVE-2025-68758, CVE-2025-68759, CVE-2025-68764, CVE-2025-68765, CVE-2025-68767, CVE-2025-68769, CVE-2025-68771, CVE-2025-68774, CVE-2025-68776, CVE-2025-68777, CVE-2025-68780, CVE-2025-68782, CVE-2025-68783, CVE-2025-68785, CVE-2025-68787, CVE-2025-68788, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68803, CVE-2025-68804, CVE-2025-68808, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-71064, CVE-2025-71066, CVE-2025-71068, CVE-2025-71069, CVE-2025-71075, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71081, CVE-2025-71082, CVE-2025-71083, CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71096, CVE-2025-71097, CVE-2025-71098, CVE-2025-71102, CVE-2025-71104, CVE-2025-71105, CVE-2025-71108, CVE-2025-71111, CVE-2025-71112, CVE-2025-71113, CVE-2025-71114, CVE-2025-71116, CVE-2025-71118, CVE-2025-71120, CVE-2025-71121, CVE-2025-71125, CVE-2025-71127, CVE-2025-71131, CVE-2025-71132, CVE-2025-71133, CVE-2025-71136, CVE-2025-71137, CVE-2025-71147, CVE-2025-71154, CVE-2025-71180, CVE-2025-71182, CVE-2026-22976, CVE-2026-22977, CVE-2026-22978, CVE-2026-22980, CVE-2026-22982, CVE-2026-22984, CVE-2026-22990, CVE-2026-22991, CVE-2026-22992, CVE-2026-23019, CVE-2026-23020, CVE-2026-23021, CVE-2026-23047, CVE-2026-23060, CVE-2026-23074, CVE-2026-23111, CVE-2026-23202, CVE-2026-23207)

It was discovered that kvmtool did not properly manage memory under certain circumstances. A malicious guest attacker could use this issue to cause kvmtool to crash, leading to a denial of service, or possibly execute arbitrary code on the host system. (CVE-2021-45464) It was discovered that kvmtool incorrectly handled the 9p passthrough file system. A malicious guest attacker could possibly use this issue to open special files, escape the exported 9p tree, and execute arbitrary code on the host system. (CVE-2023-2861)

Nathan Mills discovered that Vim could crash when parsing certain regular expressions. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10 (CVE-2026-32249) It was discovered that Vim did not properly sanitize user input. An attacker could possibly use this issue to execute arbitrary commands. (CVE-2026-33412) Avishay Matayev discovered that Vim's modeline sandbox could be bypassed when opening a maliciously-crafted file. An attacker could possibly use this issue to execute arbitrary commands. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34982)

It was discovered that Corosync incorrectly handled the membership commit token validity check. A remote attacker could use this issue to cause Corosync to crash, resulting in a denial of service, or to possibly obtain a small quantity of sensitive information. (CVE-2026-35091) It was discovered that Corosync incorrectly handled join message validation. A remote attacker could possibly use this issue to cause Corosync to crash, resulting in a denial of service. (CVE-2026-35092)