acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation.
Metrics
Affected Vendors & Products
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References
History
Mon, 29 Jun 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation. | |
| Title | acl < 2.4.0 TOCTOU Symlink Traversal via getfacl/setfacl/chacl | |
| Weaknesses | CWE-367 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-06-29T12:38:11.630Z
Reserved: 2026-06-12T20:20:02.948Z
Link: CVE-2026-54370
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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