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7.2 High

CVE-2026-54370 acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local…

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.

Affected products and versions

Product Affected versions Fixed in
acl 2.4 earliest → < 2.4.0 2.4.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of acl

The 3 CVEs of acl →
CVE-2026-54371 attr before version 2.6.0 contains a symlink traversal vulnerability in the getfattr and setfattr utilities that… 8.4 High CVE-2026-54369 acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions… 8.4 High
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