{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55999", "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "state": "PUBLISHED", "assignerShortName": "suse", "dateReserved": "2026-06-18T09:26:55.988Z", "datePublished": "2026-07-08T08:07:11.088Z", "dateUpdated": "2026-07-08T08:12:17.088Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "shortName": "suse", "dateUpdated": "2026-07-08T08:12:17.088Z"}, "title": "xorg-server / xwayland glamor font atlas Heap Buffer Overflow", "datePublic": "2026-07-08T07:51:00.000Z", "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": "xorg-server", "packageName": "xorg-server", "repo": "https://gitlab.freedesktop.org/xorg/xserver/", "versions": [{"status": "affected", "version": "0", "lessThan": "21.1.24", "versionType": "rpm"}], "defaultStatus": "unaffected"}, {"vendor": "X.Org", "product": "xwayland", "packageName": "xwayland", "repo": "https://gitlab.freedesktop.org/xorg/xserver/", "versions": [{"status": "affected", "version": "0", "lessThan": "24.1.13", "versionType": "rpm"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Local attackers with a X connection able to provide PCX fonts to the X \nserver xorg-server before 21.2.24 and xwayland before 24.1.13 could \ncause a heap buffer overflow via SetFont due to missing glyph boundary checks.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Local attackers with a X connection able to provide PCX fonts to the X \nserver xorg-server before 21.2.24 and xwayland before 24.1.13 could \ncause a heap buffer overflow via SetFont due to missing glyph boundary checks."}]}], "references": [{"url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/fbf7bac22e2c6bd627fb042742a23318263edae1", "tags": ["patch"]}, {"url": "https://www.openwall.com/lists/oss-security/2026/07/08/2", "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"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,21.1.24)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "xorg-server", "source": "cna", "vendor": "X.Org"}, "product": "xorg-server", "vendor": "x.org"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,24.1.13)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "xwayland", "source": "cna", "vendor": "X.Org"}, "product": "xwayland", "vendor": "x.org"}], "created": "2026-07-08T09:30:04.002671+00:00", "updated": "2026-07-08T09:30:04.002718+00:00", "vendors": ["x.org", "x.org$PRODUCT$xorg-server", "x.org$PRODUCT$xwayland"]}