CVE-2026-53048
Published: June 26, 2026Last modified: June 26, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.175-r0) |
| 25 LTS | linux-lts | Fixed (6.12.92-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
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
- https://git.kernel.org/stable/c/d8ffae016c4a78693fe1283335d0b6833a9c1366
- https://git.kernel.org/stable/c/e15f16761594e80b15776980b27c35477655a135