CVE-2026-53272 Details
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!!
A use-after-free vulnerability has been identified in the Linux kernel's EROFS filesystem. The issue arises in the synchronization of decompression operations, where the function 'z_erofs_decompress_kickoff()' can conflict with the unmounting of the filesystem. This race condition leads to 'sbi->sync_decompress' being accessed after it has been freed, creating a use-after-free scenario. The vulnerability affects several versions of the Linux kernel.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the latest kernel version can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070 | kernel.org | Patch |
| https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba | kernel.org | Patch |
| https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea | kernel.org | Patch |
| https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.17, < 6.12.94 >= 6.13, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 25, 2026 | New CVE Received | kernel.org |