🛡️ CVE-2025-26596
🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-787 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-787
Public Exploit ✅ No
Source NVD
Published 2025-02-25
Updated 2026-06-02
Modified 2026-04-06
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-linux
tigervnc
x-server 21.1.16
xwayland 24.1.6

References

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