CVE-2026-54369
acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions
- State
- Published
- Severity
- 8.4 High
- Published
- Jun 29, 2026
- Updated
- Sep 14, 2026
- Reserved
- Jun 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.4 High | 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 | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | redhat-SADP |
Weaknesses
- CWE-59 Improper Link Resolution Before File Access ('Link Following')
Affected Products
| Product | Versions |
|---|---|
aclacl project |
|
References
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1patch
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5issue-tracking
- https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functionsthird-party-advisory
- https://access.redhat.com/security/cve/CVE-2026-54369vdb-entry
- RHBZ#2490277issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json
- https://access.redhat.com/errata/RHSA-2026:54769vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:64805vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:42739vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:67142vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:67144vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:67140vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:42736vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:43420vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46836vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:34351vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:53371vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:50205vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:44481vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:58981vendor-advisory
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