{"id":"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":"2026-07-08T07:32:36.942773675Z","published":"2026-03-25T16:54:37.187Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34085.json","cwe_ids":["CWE-193"]},"references":[{"type":"WEB","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34085.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34085"},{"type":"FIX","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc"},{"type":"FIX","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.freedesktop.org/fontconfig/fontconfig","events":[{"introduced":"a7a03d6ce093042d1ad4c5cf68746f44b03d8bda"},{"fixed":"b9bec06d73340f1b5727302d13ac3df307b7febc"}],"database_specific":{"extracted_events":[{"introduced":"2.17.0"},{"last_affected":"2.17.0"}],"source":["CPE_STRING","REFERENCES"],"cpe":"cpe:2.3:a:fontconfig_project:fontconfig:2.17.0:*:*:*:*:*:*:*"}}],"versions":["2.17.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/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"}]}