CVE-2023-6377 HIGH

CVE-2023-6377: Xorg-x11-server: out-of-bounds memory reads/writes in xkb button actions

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-125
Published December 13, 2023
Last update March 24, 2026

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved.

Key dates

02Disclosure timeline

December 13, 2023 CVE published
March 24, 2026 Record updated