{"id":"AZL-91394","summary":"CVE-2026-54370 affecting package acl for versions less than 2.4.0-1","details":"acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation.","modified":"2026-08-30T05:26:50Z","published":"2026-06-29T14:16:57Z","upstream":["CVE-2026-54370"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54370"}],"affected":[{"package":{"name":"acl","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/acl"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-91394.json"}}],"schema_version":"1.9.0"}