CVE-2026-53272

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!!

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-06-25

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070
• https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba
• https://git.kernel.org/stable/c/59db5d8bcc65e04d8598afd81ec3a18edb407470
• https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea
• https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296

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