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CVE-2026-53272

7.8 high Modified
NVD · CVE.org

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!!

Fix

Patch, vendor advisory and mitigation references on NVD 4

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. CwesCWE-416NVD modified 2026-10-21 13:19
  2. Cpes+7 CPE criteria (now 7)NVD modified 2026-10-21 13:19
  3. StatusPublished → ModifiedNVD modified 2026-10-21 13:19
  4. CVSS7.8 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-21 13:19
  5. First seenunscored · linuxNVD modified 2026-10-21 12:42

Affected (CPE criteria) 7

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*

References 5