CVE-2026-34000
Estado: ModificadaCrítica (9.1)—
A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Puntuación base: 9.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.53%
- Percentil entre todas las CVEs puntuadas: 43
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1005Data from Local Systemcollection90 % - Impacto secundario
T1499.004Application or System Exploitationimpact80 %
Red sin autenticación (PR:N, AV:N) permite lectura de memoria no inicializada (C:H) e interrupción del servicio (A:H) en X.Org X11 sin interacción del usuario.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
CWE
- CWE-125
Referencias
- https://access.redhat.com/errata/RHSA-2026:19342
- https://access.redhat.com/errata/RHSA-2026:20547
- https://access.redhat.com/errata/RHSA-2026:20555
- https://access.redhat.com/errata/RHSA-2026:20557
- https://access.redhat.com/errata/RHSA-2026:20558
- https://access.redhat.com/errata/RHSA-2026:20560
- https://access.redhat.com/errata/RHSA-2026:20561
- https://access.redhat.com/errata/RHSA-2026:20562
- https://access.redhat.com/errata/RHSA-2026:20563
- https://access.redhat.com/errata/RHSA-2026:20575
- https://access.redhat.com/errata/RHSA-2026:20576
- https://access.redhat.com/errata/RHSA-2026:20590
- https://access.redhat.com/errata/RHSA-2026:21699
- https://access.redhat.com/errata/RHSA-2026:21712
- https://access.redhat.com/errata/RHSA-2026:21715
- https://access.redhat.com/errata/RHSA-2026:21716
- https://access.redhat.com/errata/RHSA-2026:21718
- https://access.redhat.com/errata/RHSA-2026:21741
- https://access.redhat.com/errata/RHSA-2026:21742
- https://access.redhat.com/errata/RHSA-2026:22424
- https://access.redhat.com/errata/RHSA-2026:22456
- https://access.redhat.com/errata/RHSA-2026:23254
- https://access.redhat.com/errata/RHSA-2026:23255
- https://access.redhat.com/errata/RHSA-2026:23496
- https://access.redhat.com/errata/RHSA-2026:24341
- https://access.redhat.com/security/cve/CVE-2026-34000
- https://bugzilla.redhat.com/show_bug.cgi?id=2451107
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-34000",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-34000",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-05-05T18:51:27.642857Z"
}
}
],
"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
}
]
},
"affected": [
{
"source": "secalert@redhat.com",
"affectedData": [
{
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:24.1.5-6.el10_0",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server-Xwayland",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:rhel_els:6"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION",
"versions": [
{
"status": "unaffected",
"version": "0:1.1.0-25.el6_10.16",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:rhel_els:7"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.4-34.el7_9",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:rhel_els:7"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.8.0-36.el7_9.4",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.10-4.el8_4",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.11.0-8.el8_4.15",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.10-4.el8_4",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
"versions": [
{
"status": "unaffected",
"version": "0:1.11.0-8.el8_4.15",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"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 Advanced Mission Critical Update Support",
"versions": [
{
"status": "unaffected",
"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 Advanced Mission Critical Update Support",
"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_eus_long_life:8.6::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.12.0-6.el8_6.17",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.6::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
"versions": [
{
"status": "unaffected",
"version": "0:1.12.0-6.el8_6.17",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"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": "0:21.1.3-2.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": "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 Update Services for SAP Solutions",
"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_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
"versions": [
{
"status": "unaffected",
"version": "0:21.1.3-13.el8_8",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server-Xwayland",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.11-18.el8_8",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
"versions": [
{
"status": "unaffected",
"version": "0:1.12.0-15.el8_8.17",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:21.1.3-13.el8_8",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server-Xwayland",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.11-18.el8_8",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:1.12.0-15.el8_8.17",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:9::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"versions": [
{
"status": "unaffected",
"version": "0:1.15.0-7.el9_8.1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.0::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:21.1.3-5.el9_0",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server-Xwayland",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.0::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.11-13.el9_0",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.0::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
"versions": [
{
"status": "unaffected",
"version": "0:1.11.0-22.el9_0.17",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "tigervnc",
"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": "0:21.1.3-10.el9_2",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server-Xwayland",
"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": "0:1.20.11-20.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": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.20.11-28.el9_4",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "xorg-x11-server",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_eus:9.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:22.1.9-8.el9_4",
"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:9.4::appstream"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:1.13.1-8.el9_4.9",
"lessThan": "*",
"versionType": "rpm"
}
],
"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": "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": "2026-05-05T16:16:11.647",
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:19342",
"source": "secalert@redhat.com"
},
{
"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-2026-34000",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451107",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server."
}
],
"lastModified": "2026-06-17T10:38:24.887",
"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"
}