🛡️ CVE-2025-26599
🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-824 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.

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-824
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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