CVE-2026-63804

The CVE-2026-63804 entry concerns the Linux kernel GFS2: gfs2_qd_dealloc uses the superblock sdp via qd->qd_sbd after freeing qd, risking use-after-free when gfs2_put_super() may already free sdp via free_sbd() during unmount. The root cause is that an RCU callback could observe a freed superb...