CVE-2025-26599

HIGH

X.Org - Use After Free

Title source: llm

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.

References (17)

Scores

CVSS v3 7.8
EPSS 0.0006
EPSS Percentile 18.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Classification

CWE
CWE-824
Status published

Affected Products (6)

tigervnc/tigervnc
x.org/x_server < 21.1.16
x.org/xwayland < 24.1.6
redhat/enterprise_linux
redhat/enterprise_linux
redhat/enterprise_linux

Timeline

Published Feb 25, 2025
Tracked Since Feb 18, 2026