CVE-2025-49177 MEDIUM

CVE-2025-49177: Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: data leak in xfixes extension's xfixessetclientdisconnectmode

Vendor X.org
Product xwayland
Weakness CWE-200 · Info exposure
Published June 17, 2025
Last update December 11, 2025
View on NVD All CVEs

CVSS base score

6.1/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

What the vulnerability does

01Description

A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.

Key dates

02Disclosure timeline

June 17, 2025 CVE published
December 11, 2025 Record updated