CVE-2025-26596 HIGH

CVE-2025-26596: Xorg: xwayland: heap overflow in xkbwritekeysyms()

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-787
Published February 25, 2025
Last update April 6, 2026
View on NVD All CVEs

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 heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.

Key dates

02Disclosure timeline

February 25, 2025 CVE published
April 6, 2026 Record updated