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!!

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00164.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
40452ffca3c1a0f2994e826f9fa213b107f1a2d4 affected < 86ab00cf81d44b675bb23db62b88fd76c8ac8cea
40452ffca3c1a0f2994e826f9fa213b107f1a2d4 affected < 00bf6868df65fa95b3854996246d15759fdc7070
40452ffca3c1a0f2994e826f9fa213b107f1a2d4 affected < 95caf60da33d87ed26c28993620f0d92487b0296
40452ffca3c1a0f2994e826f9fa213b107f1a2d4 affected < 1aee05e814d292064bf5fa15733741040cdc48ba
Linux Linux affected
Version Status Constraints
5.17 affected —
0 unaffected < 5.17
6.12.94 unaffected ≤ 6.12.*
6.18.36 unaffected ≤ 6.18.*
7.0.13 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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Fixes

Solution

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Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070 cve-icon
https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba cve-icon
https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea cve-icon
https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296 cve-icon
History

Thu, 25 Jun 2026 12:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
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!!
Title erofs: fix use-after-free on sbi->sync_decompress
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:39:57.147Z

Reserved: 2026-06-09T07:44:35.395Z

Link: CVE-2026-53272

cve-icon Vulnrichment

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cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-25T11:45:03Z

Weaknesses