Ubuntu Security Advisories

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; - PowerPC architecture; - x86 architecture; - ACPI drivers; - Ublk userspace block driver; - Clock framework and drivers; - GPU drivers; - IIO subsystem; - InfiniBand drivers; - Media drivers; - MemoryStick subsystem; - Network drivers; - NTB driver; - PCI subsystem; - Remote Processor subsystem; - Thermal drivers; - Virtio Host (VHOST) subsystem; - 9P distributed file system; - File systems infrastructure; - JFS file system; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - Memory management; - RDMA verbs API; - Kernel fork() syscall; - Tracing infrastructure; - Watch queue notification mechanism; - Asynchronous Transfer Mode (ATM) subsystem; - Networking core; - IPv4 networking; - IPv6 networking; - Netfilter; - Network traffic control; - SCTP protocol; - TLS protocol; - SoC Audio for Freescale CPUs drivers; (CVE-2025-39728, CVE-2025-23136, CVE-2025-22062, CVE-2025-22035, CVE-2025-22020, CVE-2025-22083, CVE-2025-22071, CVE-2025-22060, CVE-2025-22073, CVE-2025-22044, CVE-2025-22063, CVE-2025-22079, CVE-2025-22057, CVE-2025-22095, CVE-2025-39735, CVE-2025-39682, CVE-2025-22058, CVE-2025-22021, CVE-2025-22018, CVE-2025-22056, CVE-2025-22054, CVE-2025-22080, CVE-2025-22039, CVE-2025-22019, CVE-2025-22038, CVE-2025-22028, CVE-2023-53034, CVE-2024-58092, CVE-2025-38637, CVE-2025-22089, CVE-2025-40114, CVE-2025-22068, CVE-2025-37937, CVE-2025-22070, CVE-2025-22072, CVE-2025-22086, CVE-2025-22050, CVE-2025-22040, CVE-2025-22065, CVE-2025-38575, CVE-2025-22064, CVE-2025-22033, CVE-2025-22041, CVE-2025-22090, CVE-2025-22036, CVE-2025-23138, CVE-2025-22047, CVE-2025-38240, CVE-2025-22066, CVE-2025-22042, CVE-2025-38152, CVE-2025-22055, CVE-2025-22081, CVE-2025-22045, CVE-2025-22053, CVE-2025-22075, CVE-2025-22027, CVE-2025-22025, CVE-2025-22097)

USN-7836-1 fixed vulnerabilities in Bind. This update provides the corresponding fixes for Ubuntu 20.04 LTS. Original advisory details: Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. (CVE-2025-8677) Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind incorrectly accepted certain records from answers. A remote attacker could possibly use this issue to perform a cache poisoning attack. (CVE-2025-40778) Amit Klein and Omer Ben Simhon discovered that Bind used a weak PRNG. A remote attacker could possibly use this issue to perform a cache poisoning attack. (CVE-2025-40780)

Hanno Böck discovered that Raptor incorrectly handled memory operations when processing certain input files. An attacker could possibly use this issue to cause Raptor to crash, resulting in a denial of service. (CVE-2020-25713) Pedro Ribeiro discovered that Raptor incorrectly handled parsing certain tuples. An attacker could possibly use this issue to cause Raptor to crash, resulting in a denial of service. (CVE-2024-57822) Pedro Ribeiro discovered that Raptor incorrectly handled parsing certain turtles. An attacker could use this issue to cause Raptor to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2024-57823)

Hanno Böck discovered that Raptor incorrectly handled memory operations when processing certain input files. An attacker could use this issue to cause Raptor to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-18926) Hanno Böck discovered that Raptor incorrectly handled memory operations when processing certain input files. An attacker could possibly use this issue to cause Raptor to crash, resulting in a denial of service. (CVE-2020-25713)

Barak Gross discovered that some Intel® Xeon® processors with SGX enabled did not properly handle buffer restrictions. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-20053) Avinash Maddy discovered that some Intel® processors did not properly isolate or compartmentalize the stream cache mechanisms. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-20109) Joseph Nuzman discovered that some Intel® Xeon® processors did not properly manage references to active allocate resources. A local authenticated user could potentially use this issue to cause a denial of service (system crash). (CVE-2025-21090) It was discovered that some Intel® Xeon® 6 processors did not properly provide sufficient granularity of access control in the out of band management service module (OOB-MSM). An authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22839) It was discovered that some Intel® Xeon® 6 Scalable processors did not properly handle a specific sequence of processor instructions, leading to unexpected behavior. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22840) Joseph Nuzman discovered that some Intel® Xeon® 6 processors with Intel® Trust Domain Extensions (Intel® TDX) did not properly handle overlap between protected memory ranges. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22889) Avraham Shalev discovered that some Intel® Xeon® processors did not properly provide sufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-24305) Aviv Eisen and Avraham Shalev discovered that some Intel® Xeon® 6 processors when using Intel® SGX or Intel® TDX did not properly protect against out-of-bounds writes in the memory subsystem. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-26403) Aviv Eisen and Avraham Shalev discovered that some Intel® Xeon® 6 processors when using Intel® SGX or Intel® TDX did not properly implement security checks in the DDRIO configuration. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-32086)

It was discovered that sudo-rs incorrectly handled passwords when timeouts occurred and the pwfeedback default was not set. This could result in a partially typed password being output to standard input, contrary to expectations. It was discovered that sudo-rs incorrectly handled the targetpw and rootpw default settings when creating timestamp files. A local attacker could possibly use this issue to bypass authentication in certain configurations.

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - Virtio block driver; - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Media drivers; - Network drivers; - Ethernet team driver; - TTY drivers; - Framebuffer layer; - BTRFS file system; - Ext4 file system; - Network file system (NFS) server daemon; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - Packet sockets; - SCTP protocol; - VMware vSockets driver; - USB sound devices; (CVE-2021-47149, CVE-2021-47294, CVE-2021-47319, CVE-2021-47330, CVE-2021-47589, CVE-2023-52574, CVE-2023-52650, CVE-2024-27078, CVE-2024-35849, CVE-2024-49924, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-21796, CVE-2025-37785, CVE-2025-37838, CVE-2025-38352, CVE-2025-38617, CVE-2025-38618)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Ethernet team driver; - Ext4 file system; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - SCTP protocol; - USB sound devices; (CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-37838, CVE-2025-38352)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

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: - Ext4 file system; - Network file system (NFS) server daemon; - Packet sockets; - Network traffic control; - VMware vSockets driver; (CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617, CVE-2025-38618)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. 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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - HSI subsystem; - I2C subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-38425)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

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; - PowerPC architecture; - x86 architecture; - ACPI drivers; - Ublk userspace block driver; - Clock framework and drivers; - GPU drivers; - IIO subsystem; - InfiniBand drivers; - Media drivers; - MemoryStick subsystem; - Network drivers; - NTB driver; - PCI subsystem; - Remote Processor subsystem; - Thermal drivers; - Virtio Host (VHOST) subsystem; - 9P distributed file system; - File systems infrastructure; - JFS file system; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - Memory management; - RDMA verbs API; - Kernel fork() syscall; - Tracing infrastructure; - Watch queue notification mechanism; - Asynchronous Transfer Mode (ATM) subsystem; - Networking core; - IPv4 networking; - IPv6 networking; - Netfilter; - Network traffic control; - SCTP protocol; - TLS protocol; - SoC Audio for Freescale CPUs drivers; (CVE-2025-39728, CVE-2025-23136, CVE-2025-22062, CVE-2025-22035, CVE-2025-22020, CVE-2025-22083, CVE-2025-22071, CVE-2025-22060, CVE-2025-22073, CVE-2025-22044, CVE-2025-22063, CVE-2025-22079, CVE-2025-22057, CVE-2025-22095, CVE-2025-39735, CVE-2025-39682, CVE-2025-22058, CVE-2025-22021, CVE-2025-22018, CVE-2025-22056, CVE-2025-22054, CVE-2025-22080, CVE-2025-22039, CVE-2025-22019, CVE-2025-22038, CVE-2025-22028, CVE-2023-53034, CVE-2024-58092, CVE-2025-38637, CVE-2025-22089, CVE-2025-40114, CVE-2025-22068, CVE-2025-37937, CVE-2025-22070, CVE-2025-22072, CVE-2025-22086, CVE-2025-22050, CVE-2025-22040, CVE-2025-22065, CVE-2025-38575, CVE-2025-22064, CVE-2025-22033, CVE-2025-22041, CVE-2025-22090, CVE-2025-22036, CVE-2025-23138, CVE-2025-22047, CVE-2025-38240, CVE-2025-22066, CVE-2025-22042, CVE-2025-38152, CVE-2025-22055, CVE-2025-22081, CVE-2025-22045, CVE-2025-22053, CVE-2025-22075, CVE-2025-22027, CVE-2025-22025, CVE-2025-22097)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Ethernet team driver; - TTY drivers; - Ext4 file system; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - SCTP protocol; - USB sound devices; (CVE-2021-47294, CVE-2021-47330, CVE-2023-52574, CVE-2023-52650, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-37838, CVE-2025-38352)

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS.

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. 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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)