CVE-2026-56002

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56002", "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "state": "PUBLISHED", "assignerShortName": "suse", "dateReserved": "2026-06-18T09:26:55.988Z", "datePublished": "2026-07-08T09:12:51.480Z", "dateUpdated": "2026-07-09T03:55:46.745Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "shortName": "suse", "dateUpdated": "2026-07-08T09:12:51.480Z"}, "title": "libXfont2 PCF Font Parsing Heap Buffer Overflow", "datePublic": "2026-07-08T09:08:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-122", "description": "CWE-122 Heap-based buffer overflow", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-234", "descriptions": [{"lang": "en", "value": "CAPEC-234 Hijacking a privileged process"}]}], "affected": [{"vendor": "X.Org", "product": "libXfont2", "packageName": "libXfont2", "repo": "https://gitlab.freedesktop.org/xorg/lib/libxfont", "versions": [{"status": "affected", "version": "0", "lessThan": "2.0.8", "versionType": "rpm"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:x.org:libxfont2:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndExcluding": "2.0.8"}]}]}], "descriptions": [{"lang": "en", "value": "A heap bufferflow in pcfReadFont() due to missing glyph bounds checking\u00a0in libXfont2 before 2.0.8\u00a0 allows attackers authenticated as X client to execute code within the X server.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8  allows attackers authenticated as X client to execute code within the X server."}]}], "references": [{"url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/b4389e0b1d84a690b819bb27b1439968811a3674", "tags": ["patch"]}, {"url": "https://www.openwall.com/lists/oss-security/2026/07/08/1", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Anonymous working with Trend Micro Zero Day Initiative.", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-08T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-56002"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-09T03:55:46.745Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-56002", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-08T12:07:25.281480Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-08T12:07:30.351Z"}}], "cna": {"title": "libXfont2 PCF Font Parsing Heap Buffer Overflow", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Anonymous working with Trend Micro Zero Day Initiative."}], "impacts": [{"capecId": "CAPEC-234", "descriptions": [{"lang": "en", "value": "CAPEC-234 Hijacking a privileged process"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://gitlab.freedesktop.org/xorg/lib/libxfont", "vendor": "X.Org", "product": "libXfont2", "versions": [{"status": "affected", "version": "0", "lessThan": "2.0.8", "versionType": "rpm"}], "packageName": "libXfont2", "defaultStatus": "unaffected"}], "datePublic": "2026-07-08T09:08:00.000Z", "references": [{"url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/b4389e0b1d84a690b819bb27b1439968811a3674", "tags": ["patch"]}, {"url": "https://www.openwall.com/lists/oss-security/2026/07/08/1", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "A heap bufferflow in pcfReadFont() due to missing glyph bounds checking\u00a0in libXfont2 before 2.0.8\u00a0 allows attackers authenticated as X client to execute code within the X server.", "supportingMedia": [{"type": "text/html", "value": "A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8  allows attackers authenticated as X client to execute code within the X server.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-122", "description": "CWE-122 Heap-based buffer overflow"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:x.org:libxfont2:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.0.8", "versionStartIncluding": "0"}], "operator": "OR"}], "operator": "OR"}], "providerMetadata": {"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "shortName": "suse", "dateUpdated": "2026-07-08T09:12:51.480Z"}}}, "cveMetadata": {"cveId": "CVE-2026-56002", "state": "PUBLISHED", "dateUpdated": "2026-07-09T03:55:46.745Z", "dateReserved": "2026-06-18T09:26:55.988Z", "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "datePublished": "2026-07-08T09:12:51.480Z", "assignerShortName": "suse"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "libXfont2", "product": "libXfont2", "repo": "https://gitlab.freedesktop.org/xorg/lib/libxfont", "vendor": "X.Org", "versions": [{"lessThan": "2.0.8", "status": "affected", "version": "0", "versionType": "rpm"}]}], "source": "meissner@suse.de"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:x:libxfont:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B6981B1-C366-45C6-A1FB-4F7B492F251E", "versionEndExcluding": "2.0.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap bufferflow in pcfReadFont() due to missing glyph bounds checking\u00a0in libXfont2 before 2.0.8\u00a0 allows attackers authenticated as X client to execute code within the X server."}, {"lang": "es", "value": "Un desbordamiento de b\u00fafer de pila en pcfReadFont() debido a la falta de comprobaci\u00f3n de l\u00edmites de glifos en libXfont2 antes de 2.0.8 permite a los atacantes autenticados como cliente X ejecutar c\u00f3digo dentro del servidor X."}], "id": "CVE-2026-56002", "lastModified": "2026-10-25T20:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 6.0, "source": "meissner@suse.de", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56002", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-08T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-07-08T10:16:23.327", "references": [{"source": "meissner@suse.de", "tags": ["Patch"], "url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/b4389e0b1d84a690b819bb27b1439968811a3674"}, {"source": "meissner@suse.de", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2026/07/08/1"}], "sourceIdentifier": "meissner@suse.de", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "meissner@suse.de", "type": "Secondary"}]}

{"bugzilla": {"description": "libXfont2: PCF Font Parsing Heap Buffer Overflow", "id": "2496641", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2496641"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in libXfont2. A specially crafted PCF (Portable Compiled Format) font file, when processed by libXfont2, can lead to a buffer overflow. This occurs because the font parsing process does not properly validate the size of a bitmap buffer against the glyph metrics provided in the malicious font file. An attacker could exploit this vulnerability by providing a malicious font, potentially leading to arbitrary code execution or a denial of service."], "name": "CVE-2026-56002", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Under investigation", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Under investigation", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56002\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56002"], "statement": "This is an Important flaw in libXfont2, affecting Red Hat Enterprise Linux. A heap buffer overflow during PCF font file parsing can lead to arbitrary code execution or denial of service. Exploitation requires processing a specially crafted font file, but does not necessitate rendering.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.0.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 97.0, "source": "matching"}]}, "original": {"product": "libXfont2", "source": "cna", "vendor": "X.Org"}, "product": "libxfont", "vendor": "x.org"}], "created": "2026-07-08T20:45:07.819561+00:00", "updated": "2026-08-01T16:45:03.447727+00:00", "vendors": ["x.org", "x.org$PRODUCT$libxfont"]}