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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-53272

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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!!

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 5627e57f1da68ff0146896eb3d2eed25e62adc44affected
  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 59db5d8bcc65e04d8598afd81ec3a18edb407470affected
  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 86ab00cf81d44b675bb23db62b88fd76c8ac8ceaaffected
  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 00bf6868df65fa95b3854996246d15759fdc7070affected
  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 95caf60da33d87ed26c28993620f0d92487b0296affected
  • 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 to < 1aee05e814d292064bf5fa15733741040cdc48baaffected

Linux Linux

Default version status: affected

  • 5.17affected
  • 0 to < 5.17unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.94 to ≤ 6.12.*unaffected
  • 6.18.36 to ≤ 6.18.*unaffected
  • 7.0.13 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References