CVE-2026-54369
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.
- Score
- CVSS 4.0 8.4 High
- Status
- Deferred - disclosure@vulncheck.com
- Published
- 2026-06-29
- Last modified
- 2026-10-25
- Weaknesses
- CWE-59
Affected products
- Acl (Acl Project)
- Discovery (Redhat)
- Enterprise Linux (Redhat)
- Enterprise Linux Eus (Redhat)
- Hummingbird (Redhat)
- Insights Proxy (Redhat)
- Openshift (Redhat)
- Openshift Distributed Tracing (Redhat)
- Rhui (Redhat)
References
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1
- https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5
- https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions
- https://access.redhat.com/security/cve/CVE-2026-54369
- https://bugzilla.redhat.com/show_bug.cgi?id=2490277
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json
- https://access.redhat.com/errata/RHSA-2026:54769
- https://access.redhat.com/errata/RHSA-2026:64805
- https://access.redhat.com/errata/RHSA-2026:42739
- https://access.redhat.com/errata/RHSA-2026:67142
- https://access.redhat.com/errata/RHSA-2026:67144
- https://access.redhat.com/errata/RHSA-2026:67140
- https://access.redhat.com/errata/RHSA-2026:42736
- https://access.redhat.com/errata/RHSA-2026:43420
- https://access.redhat.com/errata/RHSA-2026:46836
- https://access.redhat.com/errata/RHSA-2026:34351
- https://access.redhat.com/errata/RHSA-2026:53371
- https://access.redhat.com/errata/RHSA-2026:50205
- https://access.redhat.com/errata/RHSA-2026:44481
- https://access.redhat.com/errata/RHSA-2026:58981
