{"id":"DEBIAN-CVE-2026-5745","details":"A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare \"d\" or \"default\" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).","modified":"2026-09-14T17:03:20.917834880Z","published":"2026-04-07T16:16:32.307Z","upstream":["CVE-2026-5745"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-5745"}],"affected":[{"package":{"name":"libarchive","ecosystem":"Debian:12","purl":"pkg:deb/debian/libarchive?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-1","3.6.2-1+deb12u1","3.6.2-1+deb12u2","3.6.2-1+deb12u3","3.6.2-1+deb12u4","3.6.2-1+deb12u5","3.7.2-1","3.7.2-1.1","3.7.2-1.1~exp1","3.7.2-2","3.7.2-2.1","3.7.4-1","3.7.4-1.1","3.7.4-2","3.7.4-3","3.7.4-4","3.8.4-1","3.8.5-1","3.8.6-1","3.8.7-1","3.8.8-1","3.8.8-2","3.8.9-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"}},{"package":{"name":"libarchive","ecosystem":"Debian:13","purl":"pkg:deb/debian/libarchive?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.4-4","3.7.4-4+deb13u1","3.8.4-1","3.8.5-1","3.8.6-1","3.8.7-1","3.8.8-1","3.8.8-2","3.8.9-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"}},{"package":{"name":"libarchive","ecosystem":"Debian:14","purl":"pkg:deb/debian/libarchive?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.8-1"}]}],"versions":["3.7.4-4","3.8.4-1","3.8.5-1","3.8.6-1","3.8.7-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}