Summary
A high-severity use-after-free vulnerability in the Linux kernel's nf_tables subsystem (CVE-2026-23111) allows unprivileged local users to escalate privileges to root by exploiting a logic error caused by a single incorrect character.
Take Action:
If you run Linux servers or workstations (especially Debian Bookworm/Trixie, Ubuntu 22.04/24.04), update your kernel right away to patch CVE-2026-23111, since any local user could use it to gain full root control. Until you can patch, limit who can log in to your systems to trusted users only and keep user namespace restrictions enabled - but remember these are only speed bumps, not a fix, so don't delay the kernel update.
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