CVE-2026-34000

Published May 5, 2026

Last updated 7 hours ago

CVSS medium 6.1

Overview

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.
Source
secalert@redhat.com
NVD status
Modified
Products
x_server, enterprise_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Severity
CRITICAL

Weaknesses

secalert@redhat.com
CWE-125

Social media

Hype score
Not currently trending

Configurations

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References

Sources include official advisories and independent security research.