Working Exploit Released for Linux Kernel Use-After-Free Flaw CVE-2026-23111 Enabling Local Root Access
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Summary
Security researchers have released a working exploit for CVE-2026-23111, a Linux kernel use-after-free vulnerability in nf_tables. The flaw allows unprivileged local users to escalate to root privileges and escape containers. The exploit has been publicly reproduced across multiple Linux distributions including Ubuntu, Debian, RHEL, SUSE, and Amazon Linux. Defenders are urged to patch and reboot immediately if their kernels lack the fix.
Key quotes
· 2 pulledSecurity researchers released a working exploit for CVE-2026-23111, a Linux kernel use-after-free in nf_tables that can let an unprivileged local user gain root and escape a container.
The flaw has been publicly reproduced across multiple distributions, so defenders should patch and reboot immediately if their kernels still lack the fix.
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