CVE-2026-53272None▾ SunlitIn 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. Whe…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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!!
Linux >= 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 < 59db5d8bcc65e04d8598afd81ec3a18edb407470Linux >= 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 < 86ab00cf81d44b675bb23db62b88fd76c8ac8ceaLinux >= 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 < 00bf6868df65fa95b3854996246d15759fdc7070Linux >= 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 < 95caf60da33d87ed26c28993620f0d92487b0296Linux >= 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 < 1aee05e814d292064bf5fa15733741040cdc48baLinux 5.17Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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