CVE-2026-33999
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-04-23 16:16:24.623000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-33999",
"sourceIdentifier": "[email protected]",
"published": "2026-04-23T16:16:24.623",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts."
},
{
"lang": "es",
"value": "Se encontró una falla en el servidor X de X.Org. Esta vulnerabilidad de subdesbordamiento de enteros, específicamente en el manejo del mapa de compatibilidad XKB, permite a un atacante con acceso local o remoto al servidor X11 desencadenar un desbordamiento de lectura de búfer. Esto puede llevar a violaciones de seguridad de la memoria y potencialmente a una denegación de servicio (DoS) u otros impactos graves."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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