xfs: fix memory leak in xfs_dqinode_metadir_create()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64356
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:18 UTC
Updated2026-07-25 10:17:18 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xfs: fix memory leak in xfs_dqinode_metadir_create() If xfs_metadir_create() fails in xfs_dqinode_metadir_create(), the current code returns directly, leaking the allocated update and transaction state. If the subsequent commit fails, the caller-owned inode reference is left behind. Fix this memory leak by routing the create failure path through xfs_metadir_cancel(). For both create and commit failures, finish and release any inode returned to the caller, mirroring the unwind pattern in xfs_metadir_mkdir(). The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. Runtime validation used kprobe fault injection during `mount -o uquota` on a metadir XFS image. Injecting xfs_metadir_create() reproduced the old active-update path that left mount stuck later in mount setup; after this change, the same injection reported cancel_hits=1 and irele_hits=1. Injecting xfs_metadir_commit() exercised the old inode-reference leak path; after this change, it reported irele_hits=1.

Risk And Classification

EPSS: 0.001790000 probability, percentile 0.076690000 (date 2026-07-26)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1 git Not specified
CNA Linux Linux affected e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 06a2e6dbaa26c0740ac76dfa66b0aedc78d05820 git Not specified
CNA Linux Linux affected e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 45de375b25060edf46e20abb36521ba530336ceb git Not specified
CNA Linux Linux affected 6.13 Not specified
CNA Linux Linux unaffected 6.13 semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/06a2e6dbaa26c0740ac76dfa66b0aedc78d05820 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/45de375b25060edf46e20abb36521ba530336ceb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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