Description
acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers to escalate privileges by replacing any pathname component with a symbolic link. Attackers who control any component of a pathname processed by a privileged caller can redirect ACL read or write operations to arbitrary files or directories, enabling unauthorized manipulation of access control lists and local privilege escalation.
Severity (CVSS)
| Base score | 8.4 |
|---|---|
| Severity | High |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-59 — Improper Link Resolution Before File Access ('Link Following')
Affected products
| Vendor | Product | Versions |
|---|---|---|
| acl project | acl | 0 to <2.4.0 |
References
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1 (patch)
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5 (issue-tracking)
- https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions (third-party-advisory)
- https://access.redhat.com/security/cve/CVE-2026-54369 (vdb-entry x_refsource_REDHAT)
- https://bugzilla.redhat.com/show_bug.cgi?id=2490277 (issue-tracking x_refsource_REDHAT)
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json (x_sadp-csaf-vex)
Generated from the official CVE List on 30 Jun 2026 07:04 UTC.