CVE-2026-54369

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.

References

https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json

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://bugzilla.redhat.com/show_bug.cgi?id=2490277

https://access.redhat.com/security/cve/CVE-2026-54369

https://access.redhat.com/errata/RHSA-2026:43420

https://access.redhat.com/errata/RHSA-2026:42739

https://access.redhat.com/errata/RHSA-2026:42736

https://access.redhat.com/errata/RHSA-2026:34351

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS