CVE-2026-34002

{"id": "CVE-2026-34002", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34002", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-06T14:27:00.488000Z"}}], "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", 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"version": "0:21.1.3-2.el8_6.6", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.6::appstream", "cpe:/a:redhat:rhel_e4s:8.6::appstream", "cpe:/a:redhat:rhel_tus:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "versions": [{"status": "unaffected", "version": "0:1.20.11-7.el8_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.6::appstream", "cpe:/a:redhat:rhel_e4s:8.6::appstream", "cpe:/a:redhat:rhel_tus:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": 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"https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.2::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:1.20.11-20.el9_2", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.2::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:1.12.0-14.el9_2.14", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.4::appstream", "cpe:/a:redhat:rhel_eus:9.4::crb"], "vendor": 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"packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream", "cpe:/a:redhat:rhel_eus:9.6::crb"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:1.20.11-33.el9_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream", "cpe:/a:redhat:rhel_eus:9.6::crb"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:23.2.7-6.el9_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:1.14.1-10.el9_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unknown"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}]}], "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/errata/RHSA-2026:24341", "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."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en el servidor X de X.Org. Esta vulnerabilidad, una lectura fuera de l\u00edmites, afecta el manejo del mapa de modificadores de XKB (Extensi\u00f3n de Teclado X). Un atacante con acceso al servidor X11 puede explotar esto enviando una solicitud malformada, lo que hace que el servidor lea m\u00e1s all\u00e1 de sus l\u00edmites de memoria previstos. Esto puede llevar a la exposici\u00f3n de informaci\u00f3n sensible o causar que el servidor se bloquee, lo que resulta en una denegaci\u00f3n de servicio."}], "lastModified": "2026-10-26T19:10:00.163", "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"}