The USN-8351-1 advisory addresses multiple high-severity vulnerabilities (CVSS 7.8) in the Linux kernel's Low Latency variant, including a flaw in the algif_aead module known as "Copy Fail" that allows local privilege escalation or container escape (CVE-2026-31431). Affected version ranges are extensive; for example, CVE-2026-31431 impacts kernel versions from 4.14 through 6.7 across multiple branches, excluding specific fixed versions like 5.10.254, 5.15.204, and 6.1.170. The update corrects flaws in several subsystems including the Cryptographic API, Ethernet bonding driver, Packet sockets, and TLS protocol.
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: - Cryptographic API; - Ethernet bonding driver; - Packet sockets; - TLS protocol; (CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-46028)