Linux Kernel CVE-2026-53049

Vendor-released patch: upgrade to a fixed stable kernel - 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, or 7.1 or later on the matching branch (commits via https://git.kernel.org/stable/c/fe2c8d051150b90b3ccb85f89e3b1d636cb88ec8 and the other stable commit references). Apply your distribution's corresponding kernel update once it ships the backport. Because the bug only manifests on GFS2, the most effective compensating control where patching is deferred is to avoid GFS2: migrate affected workloads to an alternative shared filesystem (e.g., OCFS2) or take the GFS2 volume offline; if GFS2 must remain mounted, reduce concurrent write/transaction pressure and monitor for kernel log warnings, soft lockups, or filesystem withdrawal events, accepting that this only narrows the race window rather than closing it. There is no network-facing control to apply since the trigger is local kernel activity.