A critical vulnerability (CVE-2026-31431, CVSS 7.8 HIGH) in the Linux kernel's algif_aead module, known as "Copy Fail," allows a local attacker to escalate privileges or escape a container via improper handling of in-place cryptographic operations. Affected versions include kernel series 5.10 (before 5.10.254), 5.15 (before 5.15.204), 6.1 (before 6.1.170), 6.6 (before 6.6.137), 6.12 (before 6.12.85), and others as listed in the NVD data. The advisory also addresses numerous other CVEs across multiple kernel subsystems, requiring updates to the specified fixed versions for each respective 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) 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: - S390 architecture; - Cryptographic API; - GPU drivers; - Ethernet bonding driver; - Network file system (NFS) server daemon; - Distributed Switch Architecture; - Netfilter; - Control group (cgroup); - Kernel kexec() syscall; - Memory management; - MAC80211 subsystem; - Multipath TCP; - Packet sockets; - TLS protocol; - Unix domain sockets; (CVE-2025-71088, CVE-2025-71090, CVE-2025-71127, CVE-2025-71134, CVE-2025-71139, CVE-2025-71141, CVE-2025-71142, CVE-2025-71144, CVE-2025-71152, CVE-2025-71155, CVE-2026-23274, CVE-2026-23351, CVE-2026-23394, CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078)