CVE-2025-26598

High

Description

An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching device ID is found, which can lead to out-of-bounds memory access.

SeverityHigh

CVSS7.8

Exploit probability—

Product

X.org Xwayland

PublishedFeb 25, 2025

First seenFeb 25, 2025

Weakness typeCWE-787Out-of-bounds write

How to fix

Update

x.org xwayland24.1.6 or later
x.org x_server21.1.16 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
x.org xwayland	v < 24.1.6	24.1.6
tigervnc tigervnc	No range specified	—
x.org x_server	v < 21.1.16	21.1.16
redhat enterprise_linux	7.0, 8.0, 9.0	—

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