Linux CVE-2026-23247

Apply the upstream Linux kernel fix by upgrading to a patched kernel version that includes commit eae2f14ab2efccdb7480fae7d42c4b0116ef8805 or later stable releases (6.18.17, 6.19.7, or 7.0-rc3 and newer). Linux distributions including Debian, Ubuntu, Red Hat, and SUSE have released or will release kernel security updates addressing this vulnerability—check your distribution's security advisories and apply kernel updates through your standard patch management process (apt, dnf, zypper, etc.). For systems unable to patch immediately, implement defense-in-depth network controls: enforce strong firewall rules that limit TCP connection establishment to known good sources, implement TCP connection tracking at the edge, and consider deploying intrusion detection systems (IDS) tuned to detect port prediction attacks. However, no effective workaround exists short of kernel patching, as the vulnerability is in the core TCP stack itself. Prioritize patching within your standard maintenance windows but do not delay beyond your next scheduled kernel update cycle.