CVE-2025-49179 HIGH

CVE-2025-49179: Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extension

Vendor X.org
Product xwayland
Weakness CWE-190
Published June 17, 2025
Last update December 11, 2025
View on NVD All CVEs

CVSS base score

7.3/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.

Key dates

02Disclosure timeline

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