Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfs: scrub: unlock dquot before early return in quota scrub xchk_quota_item can return early after calling xchk_fblock_process_error. When that helper returns false, the function returned immediately without dropping dq->q_qlock, which can leave the dquot lock held and risk lock leaks or deadlocks in later quota operations. Fix this by unlocking dq->q_qlock before the early return.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.8.1, < 6.12.80 |
References
- https://git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900Patch
- https://git.kernel.org/stable/c/3b0c3414b308e6822cda90bf99f7eac94d4cca2bPatch
- https://git.kernel.org/stable/c/d128fc0c5c2b19224927d4fd2a46c2fe6a1f606fPatch
- https://git.kernel.org/stable/c/e822f535273af0e8968eab7acc0cea0b90dd25afPatch
FAQ
What is CVE-2026-31556?
CVE-2026-31556 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: xfs: scrub: unlock dquot before early return in quota scrub xchk_quota_item can return early after calling xchk_fblock_process_err...
How severe is CVE-2026-31556?
CVE-2026-31556 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31556?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.