The USN-8280-2 security advisory addresses multiple vulnerabilities in the Linux kernel for Azure, including a flaw (CVE-2026-31431, CVSS 7.8) in the algif_aead module that mishandles in-place cryptographic operations, allowing local privilege escalation or container escape. Affected versions are extensive, spanning from kernel 4.14 up to but excluding 5.10.254, 5.11 up to but excluding 5.15.204, and similarly for later major versions; the fixed versions are explicitly listed per CVE, such as 5.10.254, 5.15.204, 6.1.170, and others. Additional high-to-critical severity flaws (CVE-2026-31504, CVSS 7.8; CVE-2026-31533, CVSS 9.8) affect the Cryptographic API, packet sockets, and TLS protocol subsystems, with corresponding fixed versions provided in the NVD data.
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; - Packet sockets; - TLS protocol; (CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078)