USN-8615-1

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503)

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:

• InfiniBand drivers;
• STMicroelectronics network drivers;
• NVME drivers;
• SCSI subsystem;
• USB over IP driver;
• Network file system (NFS) server daemon;
• SMB network file system;
• Tracing infrastructure;
• B.A.T.M.A.N. meshing protocol;
• Ethernet bridge;
• Ceph Core library;
• IPv4 networking;
• IPv6 networking;
• Netfilter;
• RxRPC session sockets;
• X.25 network layer; (CVE-2026-23272, CVE-2026-23455, CVE-2026-31402, CVE-2026-31418, CVE-2026-31607, CVE-2026-31637, CVE-2026-31649, CVE-2026-31659, CVE-2026-31682, CVE-2026-31685, CVE-2026-43011, CVE-2026-43037, CVE-2026-43038, CVE-2026-43117, CVE-2026-43383, CVE-2026-43407, CVE-2026-43414, CVE-2026-45988, CVE-2026-46043, CVE-2026-46119, CVE-2026-46135, CVE-2026-46243)