CVE-2026-31556
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900 ↗
Additional information
- NVD record
- 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