erofs: fix use-after-free on sbi->sync_decompress

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Summary

CVECVE-2026-53272
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:45 UTC
Updated2026-06-25 09:16:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: erofs: fix use-after-free on sbi->sync_decompress z_erofs_decompress_kickoff() can race with filesystem unmount, causing a use-after-free on sbi->sync_decompress. When I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff() to queue z_erofs_decompressqueue_work() asynchronously. Then, after all folios are unlocked, unmount workflow can proceed and sbi will be freed before accessing to sbi->sync_decompress. Thread (unmount) I/O completion kworker queue_work z_erofs_decompressqueue_work (all folios are unlocked) cleanup_mnt .. erofs_kill_sb erofs_sb_free kfree(sbi) access sbi->sync_decompress // UAF!!

Risk And Classification

EPSS: 0.001640000 probability, percentile 0.058950000 (date 2026-06-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 86ab00cf81d44b675bb23db62b88fd76c8ac8cea git Not specified
CNA Linux Linux affected 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 00bf6868df65fa95b3854996246d15759fdc7070 git Not specified
CNA Linux Linux affected 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 95caf60da33d87ed26c28993620f0d92487b0296 git Not specified
CNA Linux Linux affected 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 1aee05e814d292064bf5fa15733741040cdc48ba git Not specified
CNA Linux Linux affected 5.17 Not specified
CNA Linux Linux unaffected 5.17 semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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