CVE-2026-88806

{"id": "CVE-2026-88806", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-88806", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-21T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "meissner@suse.de", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}]}, "affected": [{"source": "meissner@suse.de", "affectedData": [{"repo": "https://gitlab.freedesktop.org/xorg/lib/libx11", "vendor": "x.org", "product": "libX11", "versions": [{"status": "affected", "version": "0", "lessThan": "1.8.14", "versionType": "semver"}], "packageName": "libX11", "defaultStatus": "unaffected"}]}], "published": "2026-09-21T14:17:22.273", "references": [{"url": "https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/309", "source": "meissner@suse.de"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "meissner@suse.de", "description": [{"lang": "en", "value": "CWE-122"}]}], "descriptions": [{"lang": "en", "value": "A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map."}], "lastModified": "2026-09-22T19:40:05.870", "sourceIdentifier": "meissner@suse.de"}