Linux CVE-2026-31556

| EUVD-2026-25449 MEDIUM
2026-04-24 Linux GHSA-v4f5-4j9w-9f24
Information Disclosure Linux
5.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
CVSS changed
Apr 27, 2026 - 20:22 NVD
5.5 (MEDIUM)
Patch available
Apr 24, 2026 - 16:16 EUVD

DescriptionNVD

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.

Analysis

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. …

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CVE-2026-31556 vulnerability details – vuln.today
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