erofs: fix metabuf leak in inode xattr initialization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64146
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:56 UTC
Updated2026-07-30 14:59:47 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: erofs: fix metabuf leak in inode xattr initialization commit bb88e8da0025 ("erofs: use meta buffers for xattr operations") converted xattr operations to use on-stack erofs_buf instances. erofs_init_inode_xattrs() uses such a metabuf while reading the inline xattr header and shared xattr id array. Some error paths after erofs_read_metabuf() leave through out_unlock without dropping the metabuf, so the folio reference can leak. Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a no-op if no folio has been acquired, and this keeps all paths after taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.

Risk And Classification

EPSS: 0.001620000 probability, percentile 0.059070000 (date 2026-08-02)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bb88e8da00253bea0e7f0f4cdfd7910572d7799f 492c73b21fefa36f3869cb2b188ffb7fe37b3a9b git Not specified
CNA Linux Linux affected bb88e8da00253bea0e7f0f4cdfd7910572d7799f 79b09c54c6563df9846ca3094bcfd72082c3e1d7 git Not specified
CNA Linux Linux affected 5.17 Not specified
CNA Linux Linux unaffected 5.17 semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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