CVE-2025-26596

—

CVSS 3.1

7.8 high

EPSS

<1%p36

Published

Feb 25, 2025 (Feb 25, 2025)

Modified

Jun 29, 2026

Description

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.

Vendors: tigervnc x.org redhat
Products: tigervnc, x server, xwayland, enterprise linux
Weakness: CWE-787
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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