Multiple local privilege escalation vulnerabilities in the Linux kernel, including the "Copy Fail" flaw in the algif_aead module (CVE-2026-31431, CVSS 7.8) and the "Dirty Frag" logic flaws in XFRM ESP-in-TCP and RxRPC subsystems (CVE-2026-43284, CVSS 8.8; CVE-2026-43500, CVSS 7.8), can be exploited to gain elevated privileges or escape containers. Affected versions span numerous kernel series, including Linux kernel 4.14 through 5.10.253, 5.11 through 5.15.203, 5.16 through 6.1.169, 6.2 through 6.6.136, and 6.7 through 6.12.84. Patches are available in specific kernel versions, such as 5.10.254, 5.15.204, 6.1.170, 6.6.137, 6.12.85, 6.18.22, and 7.0.5, depending on the specific CVE and kernel series.
It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-31431) It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500) 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; - Packet sockets; - RDS protocol; - TLS protocol; (CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028)