TL;DR Researchers published full details and proof-of-concept exploit code for CVE-2026-53361, a use-after-free in the Linux kernel AF_UNIX garbage collector. The flaw allows an unprivileged local user to escape a container and corrupt kernel memory. Multiple stable and enterprise kernels are affected, and patches are now available. Why It Matters This CVE-2026-53361 container escape bug needs no special privileges. Any local user with a shell can trigger it.