xfs: scrub: unlock dquot before early return in quota scrub

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Summary

CVECVE-2026-31556
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:29 UTC
Updated2026-04-27 20:14:18 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000180000 probability, percentile 0.046080000 (date 2026-04-27)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7d1f0e167a067ed741dec08b7614d76893422b04 e822f535273af0e8968eab7acc0cea0b90dd25af git Not specified
CNA Linux Linux affected 7d1f0e167a067ed741dec08b7614d76893422b04 3b0c3414b308e6822cda90bf99f7eac94d4cca2b git Not specified
CNA Linux Linux affected 7d1f0e167a067ed741dec08b7614d76893422b04 d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f git Not specified
CNA Linux Linux affected 7d1f0e167a067ed741dec08b7614d76893422b04 268378b6ad20569af0d1957992de1c8b16c6e900 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3b0c3414b308e6822cda90bf99f7eac94d4cca2b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e822f535273af0e8968eab7acc0cea0b90dd25af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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