{"id":"CVE-2026-54369","summary":"acl \u003c 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions","details":"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.","modified":"2026-10-21T10:46:19.161333816Z","published":"2026-06-29T12:37:21.666Z","related":["ALSA-2026:42736","ALSA-2026:42739","ALSA-2026:43420","SUSE-SU-2026:23670-1","SUSE-SU-2026:23705-1","SUSE-SU-2026:23726-1","SUSE-SU-2026:4176-1","openSUSE-SU-2026:11312-1","openSUSE-SU-2026:21832-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54369.json","unresolved_ranges":[{"extracted_events":[{"range":[{"fixed":"2.4.0"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]},{"extracted_events":[{"range":[{"fixed":"2.4.0"}],"source":"CPE_FIELD","strategy":"CPEApplicability"}]},{"extracted_events":[{"range":[{"fixed":"2.4.0"}],"source":"DESCRIPTION"}]}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-59"]},"references":[{"type":"WEB","url":"https://savannah.nongnu.org/projects/acl/"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34351"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42736"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42739"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43420"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:44481"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:46836"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50205"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:53371"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54769"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:58981"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:64805"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:67140"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:67142"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:67144"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-54369"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54369.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54369"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490277"},{"type":"REPORT","url":"https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5"},{"type":"FIX","url":"https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://cgit.git.savannah.nongnu.org/cgit/acl.git","events":[{"introduced":"0"},{"fixed":"3589787cd589b34bdd9265936e17190b6d3f17d1"},{"fixed":"24a227d0ab8576612194f8a56c2314389adc74a5"}],"database_specific":{"extracted_events":[{"range":[{"fixed":"3589787cd589b34bdd9265936e17190b6d3f17d1"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"24a227d0ab8576612194f8a56c2314389adc74a5"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54369.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}