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USN-8712-1: pyasn1 vulnerabilities

Ubuntu Security Advisories
6 days 23 hours ago
It was discovered that pyasn1 did not properly bound the size of long-form tag identifiers when parsing BER, CER, or DER encoded data. An attacker could possibly use this issue to cause applications decoding untrusted ASN.1 data to consume excessive CPU resources, resulting in a denial of service. (CVE-2026-59884) It was discovered that pyasn1 processed OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs. An attacker could possibly use this issue to cause applications decoding untrusted ASN.1 data to consume excessive CPU resources, resulting in a denial of service. (CVE-2026-59885) It was discovered that pyasn1 incorrectly handled conversion of decoded REAL values to Python float types. An attacker could possibly use this issue to cause applications decoding untrusted ASN.1 data to consume excessive CPU and memory resources, resulting in a denial of service. (CVE-2026-59886)

USN-8688-2: PAM vulnerability

Ubuntu Security Advisories
1 week ago
USN-8688-1 fixed a vulnerability in PAM. This update provides the corresponding fix for PAM on Ubuntu 26.04 LTS. Original advisory details: Juthawong Naisanguansee discovered that PAM incorrectly cleared failed login attempt records when certain services invoked the account phase without first performing authentication. An attacker could possibly use this issue to reset failed login counters, resulting in authentication lockout restrictions being bypassed.

USN-8555-2: Ubuntu Advantage Tools (pro client) regression

Ubuntu Security Advisories
1 week ago
USN-8555-1 fixed vulnerabilities in Ubuntu Advantage Tools. On Ubuntu 14.04 LTS only, it was discovered that some machines were unable to enable esm-infra-legacy due to a preemptive apt-helper check. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. (CVE-2026-9494) Frederick Jerusha discovered that Ubuntu Advantage Tools did not properly validate data received from the contract server when writing APT source files. An attacker could possibly use this issue to inject arbitrary APT configuration and execute arbitrary code. (CVE-2026-11386) Mateusz Gierblinski discovered that Ubuntu Advantage Tools did not properly handle symbolic links when collecting diagnostic logs. A local attacker could possibly use this issue to obtain sensitive information from files owned by the administrator. 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 26.04 LTS. (CVE-2026-12391)

USN-8710-1: libevent vulnerabilities

Ubuntu Security Advisories
1 week ago
Alexis Challande discovered that libevent incorrectly handled certain empty output buffers. An attacker could possibly use this issue to trigger a use-after-free, resulting in a denial of service or arbitrary code execution. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-63381) Rajat Raghav discovered that libevent incorrectly handled certain HTTP requests. An attacker could possibly use this issue to desynchronize HTTP request boundaries, resulting in HTTP request smuggling. (CVE-2026-63382) Qiu Sihao discovered that libevent incorrectly handled certain malformed tagged RPC data. An attacker could possibly use this issue to trigger an out-of-bounds read, resulting in a denial of service. (CVE-2026-63383) Qiu Sihao discovered that libevent incorrectly handled certain large payload lengths in tagged RPC data. An attacker could possibly use this issue to consume excessive system resources, resulting in a denial of service. (CVE-2026-63384) Asaf Meizner discovered that libevent incorrectly handled certain HTTP URIs and header values. An attacker could possibly use this issue to cause HTTP messages to be interpreted inconsistently, resulting in security restrictions being bypassed. (CVE-2026-63385)

USN-8709-1: ncurses vulnerability

Ubuntu Security Advisories
1 week ago
It was discovered that ncurses incorrectly handled specially crafted terminfo database entries. A local attacker could possibly use this issue to cause applications using ncurses to crash, resulting in a denial of service.

freerdp2-2.11.7-16.fc46

Fedora Security Advisories
1 week ago
FEDORA-2026-1c0deda1e7 Packages in this update:
  • freerdp2-2.11.7-16.fc46
Update description:

Automatic update for freerdp2-2.11.7-16.fc46.

Changelog * Mon Aug 31 2026 Ondrej Holy <oholy@redhat.com> - 2.11.7-16 - Backport several CVE fixes (CVE-2026-22852, CVE-2026-22854, CVE-2026-22855, CVE-2026-22856, CVE-2026-22858, CVE-2026-22859, CVE-2026-23530, CVE-2026-23531, CVE-2026-23532, CVE-2026-23533, CVE-2026-23534, CVE-2026-23732, CVE-2026-23883, CVE-2026-23884, CVE-2026-23948, CVE-2026-24491, CVE-2026-24675, CVE-2026-24676, CVE-2026-24679, CVE-2026-24681, CVE-2026-24683, CVE-2026-24684, CVE-2026-25952, CVE-2026-26955, CVE-2026-26965, CVE-2026-26986, CVE-2026-27951, CVE-2026-29775, CVE-2026-31806, CVE-2026-31883, CVE-2026-31884, CVE-2026-31885, CVE-2026-33983, CVE-2026-33984, CVE-2026-33985, CVE-2026-45700, CVE-2026-64624, CVE-2026-67289, CVE-2026-67299 and CVE-2026-68580) Resolves: rhbz#2430919, rhbz#2430908, rhbz#2430898, rhbz#2430914, rhbz#2430903 Resolves: rhbz#2430924, rhbz#2430933, rhbz#2429808, rhbz#2429823, rhbz#2429794 Resolves: rhbz#2443146, rhbz#2442975, rhbz#2429799, rhbz#2429814, rhbz#2429821 Resolves: rhbz#2438309, rhbz#2438321, rhbz#2438308, rhbz#2438328, rhbz#2438324 Resolves: rhbz#2438302, rhbz#2438310, rhbz#2438300, rhbz#2447394, rhbz#2453243 Resolves: rhbz#2453240, rhbz#2442837, rhbz#2442810, rhbz#2447426, rhbz#2447422 Resolves: rhbz#2447413, rhbz#2447416, rhbz#2453247, rhbz#2442857, rhbz#2491683 Resolves: rhbz#2510295, rhbz#2510643, rhbz#2503646, rhbz#2510448

USN-8708-1: sudo-rs vulnerability

Ubuntu Security Advisories
1 week ago
It was discovered that sudo-rs incorrectly handled time-of-check vs time- of-use conditions in sudoedit. A local attacker with permission to edit specific files using sudoedit could use this issue to place files in arbitrary directories, and possibly escalate their privileges. This issue only affected systems configured to grant fine-grained sudoedit file editing permissions, which is not the default configuration.

perl-Net-DNS-1.56-1.el10_3

Fedora Security Advisories
1 week ago
FEDORA-EPEL-2026-9d8de529df Packages in this update:
  • perl-Net-DNS-1.56-1.el10_3
Update description:

Security fixes (main reason to update) - Remote code injection via EDNS EXTENDED ERROR (rt.cpan #179945) - 1.56 - DoS via long DNS compression chains (rt.cpan #179946) - 1.56 - UNIX.pm no longer relies on shell for uname (rt.cpan #176900) -1.55

Notable bug fixes across the range - TCP AXFR corruption from 1-byte 0x30 treated as EOF (#177003) - IPv4 loopback disabled in IPv6-only config — Fedora41 (#158714) - Multiple "uninitialized value" fixes in UDP/TCP paths (#158706, #157700) - Nameserver: SOA missing in NODATA response (#157669)

perl-Net-DNS-1.56-1.el10_4

Fedora Security Advisories
1 week ago
FEDORA-EPEL-2026-8249fe4a72 Packages in this update:
  • perl-Net-DNS-1.56-1.el10_4
Update description:

1.56 bump

Security fixes (main reason to update) - Remote code injection via EDNS EXTENDED ERROR (rt.cpan #179945) — 1.56 - DoS via long DNS compression chains (rt.cpan #179946) — 1.56 - UNIX.pm no longer relies on shell for uname (rt.cpan #176900) — 1.55

Notable bug fixes across the range

  • TCP AXFR corruption from 1-byte 0x30 treated as EOF (#177003)
  • IPv4 loopback disabled in IPv6-only config — Fedora41 (#158714)
  • Multiple "uninitialized value" fixes in UDP/TCP paths (#158706, #157700)
  • Nameserver: SOA missing in NODATA response (#157669)
  • Resolver base selection bug on non-Unix platforms (#168433)