{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2026-34085", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-03-25T16:54:36.761Z", "datePublished": "2026-03-25T16:54:37.187Z", "dateUpdated": "2026-03-25T16:56:57.003Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "fontconfig", "vendor": "fontconfig", "versions": [{"lessThan": "2.17.1", "status": "affected", "version": "0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-193", "description": "CWE-193 Off-by-one Error", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-03-25T16:56:57.003Z"}, "references": [{"url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc"}, {"url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446"}, {"url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}}}, "dataVersion": "5.2"}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-34085", "lastModified": "2026-03-26T15:13:15.790", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 3.4, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-03-25T17:17:09.210", "references": [{"source": "cve@mitre.org", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc"}, {"source": "cve@mitre.org", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446"}, {"source": "cve@mitre.org", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-193"}], "source": "cve@mitre.org", "type": "Primary"}]}

{"bugzilla": {"description": "fontconfig: Fontconfig: Security flaw allows arbitrary code execution or system crash", "id": "2451414", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451414"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-193", "details": ["A flaw was found in fontconfig. This vulnerability, an off-by-one error in how fontconfig handles font capabilities, could allow a local attacker to cause a one-byte out-of-bounds write. This issue may lead to a system crash, resulting in a Denial of Service (DoS), or potentially enable the attacker to execute unauthorized code."], "mitigation": {"lang": "en:us", "value": "Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability."}, "name": "CVE-2026-34085", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "fontconfig", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "fontconfig", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "fontconfig", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "fontconfig", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mingw-fontconfig", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "fontconfig", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-25T16:54:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34085\nhttps://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc\nhttps://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446\nhttps://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481"], "threat_severity": "Moderate"}