CVE-2026-34000
Full vulnerability record from the local CVENow database.
Description
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.
Severity
CRITICAL
CVSS score
9.1
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-05-05 16:16:11.647000
Last modified
2026-10-26 19:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-34000",
"sourceIdentifier": "[email protected]",
"published": "2026-05-05T16:16:11.647",
"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 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."
},
{
"lang": "es",
"value": "Se encontró una falla en el servidor X de X.Org. Esta vulnerabilidad de lectura fuera de límites en el procesamiento de geometría XKB, específicamente dentro de las funciones ’CheckSetGeom()’ y ’XkbAddGeomKeyAlias’, permite a un atacante leer memoria no inicializada o fuera de límites. Un atacante con una conexión al servidor X11, ya sea localmente o remotamente, puede explotar esto sin interacción del usuario. Esto podría llevar a la divulgación del contenido de la memoria o causar una denegación de servicio al bloquear el servidor."
}
],
"affected": [
{
"source": "[email protected]",
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