CVE-2026-34002

{"id": "CVE-2026-34002", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "published": "2026-05-05T16:16:11.787", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:20547", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20555", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20557", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20558", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20560", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20561", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20562", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20563", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20575", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20576", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:20590", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21699", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21712", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21715", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21716", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21718", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21741", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:21742", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22424", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22456", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:23254", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:23255", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:23496", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-34002", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451112", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-805"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service."}], "lastModified": "2026-06-05T02:17:12.570", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "858025BB-24A3-42C3-B157-486862B37124"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}