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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00018.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
7d1f0e167a067ed741dec08b7614d76893422b04 affected < e822f535273af0e8968eab7acc0cea0b90dd25af
7d1f0e167a067ed741dec08b7614d76893422b04 affected < 3b0c3414b308e6822cda90bf99f7eac94d4cca2b
7d1f0e167a067ed741dec08b7614d76893422b04 affected < d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f
7d1f0e167a067ed741dec08b7614d76893422b04 affected < 268378b6ad20569af0d1957992de1c8b16c6e900
Linux Linux affected
Version Status Constraints
6.8 affected —
0 unaffected < 6.8
6.12.80 unaffected ≤ 6.12.*
6.18.21 unaffected ≤ 6.18.*
6.19.11 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

No data.

No data.

No data.

Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900 cve-icon cve-icon
https://git.kernel.org/stable/c/3b0c3414b308e6822cda90bf99f7eac94d4cca2b cve-icon cve-icon
https://git.kernel.org/stable/c/d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f cve-icon cve-icon
https://git.kernel.org/stable/c/e822f535273af0e8968eab7acc0cea0b90dd25af cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2026042457-CVE-2026-31556-9b84@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-31556 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-31556 cve-icon
History

Sat, 25 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-772
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Fri, 24 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
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.
Title xfs: scrub: unlock dquot before early return in quota scrub
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-04-24T14:35:39.880Z

Reserved: 2026-03-09T15:48:24.115Z

Link: CVE-2026-31556

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-24T15:16:29.977

Modified: 2026-04-24T17:51:40.810

Link: CVE-2026-31556

cve-icon Redhat

Severity : Low

Publid Date: 2026-04-24T00:00:00Z

Links: CVE-2026-31556 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses