CVE-2026-53048

Description

In the Linux kernel, the following vulnerability has been resolved: gfs2: prevent NULL pointer dereference during unmount When flushing out outstanding glock work during an unmount, gfs2_log_flush() can be called when sdp->sd_jdesc has already been deallocated and sdp->sd_jdesc is NULL. Commit 35264909e9d1 ("gfs2: Fix NULL pointer dereference in gfs2_log_flush") added a check for that to gfs2_log_flush() itself, but it missed the sdp->sd_jdesc dereference in gfs2_log_release(). Fix that.

References

• https://git.kernel.org/stable/c/233a0945a4b1dbe3f38c30afb7d05b76c67f1193
• https://git.kernel.org/stable/c/2fc4c868c9060f424fd4a7cacb0aec5082aba4de
• https://git.kernel.org/stable/c/74b4dbb946060a3233604d91859a9abd3708141d
• https://git.kernel.org/stable/c/abd73229f0e886a91a16ea781ab656bd9b4d1ee8
• https://git.kernel.org/stable/c/cec55674354794eddb80b914f73a6bf9b7fc304a