{"id":"DEBIAN-CVE-2026-34085","details":"fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.","modified":"2026-03-28T01:02:56.052847Z","published":"2026-03-25T17:17:09.210Z","withdrawn":"2026-03-28T01:02:56.052847Z","upstream":["CVE-2026-34085"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-34085"}],"affected":[{"package":{"name":"fontconfig","ecosystem":"Debian:12","purl":"pkg:deb/debian/fontconfig?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.1-4","2.14.2-1","2.14.2-2","2.14.2-3","2.14.2-4","2.14.2-5","2.14.2-6","2.15.0-1","2.15.0-1.1","2.15.0-2","2.15.0-2.1","2.15.0-2.2","2.15.0-2.3","2.15.0-2.4","2.17.1-1","2.17.1-2","2.17.1-3","2.17.1-4","2.17.1-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34085.json"}},{"package":{"name":"fontconfig","ecosystem":"Debian:13","purl":"pkg:deb/debian/fontconfig?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-2.3","2.15.0-2.4","2.17.1-1","2.17.1-2","2.17.1-3","2.17.1-4","2.17.1-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34085.json"}},{"package":{"name":"fontconfig","ecosystem":"Debian:14","purl":"pkg:deb/debian/fontconfig?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.17.1-3"}]}],"versions":["2.15.0-2.3","2.15.0-2.4","2.17.1-1","2.17.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34085.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}