xfs: save ailp before dropping the AIL lock in push callbacks

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Summary

CVECVE-2026-31454
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:39 UTC
Updated2026-05-06 19:42:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xfs: save ailp before dropping the AIL lock in push callbacks In xfs_inode_item_push() and xfs_qm_dquot_logitem_push(), the AIL lock is dropped to perform buffer IO. Once the cluster buffer no longer protects the log item from reclaim, the log item may be freed by background reclaim or the dquot shrinker. The subsequent spin_lock() call dereferences lip->li_ailp, which is a use-after-free. Fix this by saving the ailp pointer in a local variable while the AIL lock is held and the log item is guaranteed to be valid.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000240000 probability, percentile 0.067850000 (date 2026-04-27)

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 90c60e16401248a4900f3f9387f563d0178dcf34 edd1637d4e3911ab6c760f553f2040fe72f61a13 git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 19437e4f7bb909afde832b39372aa2f3ce3cfd88 git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 6dbe17f19c290a72ce57d5abc70e1fad0c3e14e5 git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 75669e987137f49c99ca44406bf0200d1892dd16 git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 d8fc60bbaf5aea1604bf9f4ed565da6a1ac7a87d git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 50f5f056807b7bed74f4f307f2ca0ed92f3e556d git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 4c7d50147316cf049462f327c4a3e9dc2b7f1dd0 git Not specified
CNA Linux Linux affected 90c60e16401248a4900f3f9387f563d0178dcf34 394d70b86fae9fe865e7e6d9540b7696f73aa9b6 git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* 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/d8fc60bbaf5aea1604bf9f4ed565da6a1ac7a87d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/50f5f056807b7bed74f4f307f2ca0ed92f3e556d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/394d70b86fae9fe865e7e6d9540b7696f73aa9b6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4c7d50147316cf049462f327c4a3e9dc2b7f1dd0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/edd1637d4e3911ab6c760f553f2040fe72f61a13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6dbe17f19c290a72ce57d5abc70e1fad0c3e14e5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/75669e987137f49c99ca44406bf0200d1892dd16 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/19437e4f7bb909afde832b39372aa2f3ce3cfd88 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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