CVE-2026-53272 (GCVE-0-2026-53272)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-25 08:39
VLAI
Title
erofs: fix use-after-free on sbi->sync_decompress
Summary
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!!
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 , < 86ab00cf81d44b675bb23db62b88fd76c8ac8cea (git)
Affected: 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 , < 00bf6868df65fa95b3854996246d15759fdc7070 (git)
Affected: 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 , < 95caf60da33d87ed26c28993620f0d92487b0296 (git)
Affected: 40452ffca3c1a0f2994e826f9fa213b107f1a2d4 , < 1aee05e814d292064bf5fa15733741040cdc48ba (git)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix use-after-free on sbi-\u003esync_decompress\n\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi-\u003esync_decompress.\n\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi-\u003esync_decompress.\n\nThread (unmount)        I/O completion        kworker\n                        queue_work\n                                              z_erofs_decompressqueue_work\n                                               (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n  erofs_sb_free\n   kfree(sbi)\n                        access sbi-\u003esync_decompress  // UAF!!"
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    "dateReserved": "2026-06-09T07:44:35.395Z",
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