A use-after-free vulnerability exists in the Linux kernel's erofs filesystem implementation. (CVE-2026-53272)
A use-after-free vulnerability exists in the Linux kernel's erofs filesystem implementation. The race condition occurs between the decompression kickoff function and filesystem unmount, leading to access of freed memory. This can cause high impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's erofs filesystem involves a race condition where z_erofs_decompress_kickoff() can be called concurrently with filesystem unmount. Specifically, after I/O completion, z_erofs_endio() queues asynchronous decompression work. Meanwhile, the unmount process can free the superblock info (sbi) structure before the queued work accesses sbi->sync_decompress, causing a use-after-free (CWE-416). This can lead to memory corruption and potentially allow an attacker with local privileges to compromise system confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this use-after-free vulnerability can result in arbitrary code execution or system crashes due to memory corruption. The CVSS vector indicates local attack vector with low complexity and no user interaction, and impacts confidentiality, integrity, and availability at a high level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid untrusted code execution on systems using the erofs filesystem and monitor for updates from the Linux kernel maintainers.
A use-after-free vulnerability exists in the Linux kernel's erofs filesystem implementation. (CVE-2026-53272)
Description
A use-after-free vulnerability exists in the Linux kernel's erofs filesystem implementation. The race condition occurs between the decompression kickoff function and filesystem unmount, leading to access of freed memory. This can cause high impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's erofs filesystem involves a race condition where z_erofs_decompress_kickoff() can be called concurrently with filesystem unmount. Specifically, after I/O completion, z_erofs_endio() queues asynchronous decompression work. Meanwhile, the unmount process can free the superblock info (sbi) structure before the queued work accesses sbi->sync_decompress, causing a use-after-free (CWE-416). This can lead to memory corruption and potentially allow an attacker with local privileges to compromise system confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this use-after-free vulnerability can result in arbitrary code execution or system crashes due to memory corruption. The CVSS vector indicates local attack vector with low complexity and no user interaction, and impacts confidentiality, integrity, and availability at a high level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid untrusted code execution on systems using the erofs filesystem and monitor for updates from the Linux kernel maintainers.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pc3h-m9mc-v77g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53272"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a4e4edac9d9e3dbe3288626
Added to database: 07/08/2026, 13:21:30 UTC
Last enriched: 07/08/2026, 13:32:35 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 6
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