CVE-2026-34002
Full vulnerability record from the local CVENow database.
Description
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.
Severity
CRITICAL
CVSS score
9.1
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-05-05 16:16:11.787000
Last modified
2026-10-26 19:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-34002",
"sourceIdentifier": "[email protected]",
"published": "2026-05-05T16:16:11.787",
"lastModified": "2026-10-26T19:10:00.163",
"vulnStatus": "Modified",
"cveTags": [],
"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 encontró una falla en el servidor X de X.Org. Esta vulnerabilidad, una lectura fuera de límites, afecta el manejo del mapa de modificadores de XKB (Extensión de Teclado X). Un atacante con acceso al servidor X11 puede explotar esto enviando una solicitud malformada, lo que hace que el servidor lea más allá de sus límites de memoria previstos. Esto puede llevar a la exposición de información sensible o causar que el servidor se bloquee, lo que resulta en una denegación de servicio."
}
],
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{
"source": "[email protected]",
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