Integer overflow in X.org Server and Xwayland - CVE-2025-49179
Published: June 17, 2025
Vulnerability identifier: #VU111230
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-49179
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: X.org
Affected software:
X.org Server
Xwayland
X.org Server
Xwayland
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow within the RecordSanityCheckRegisterClients() function in in X Record extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges.
How to mitigate CVE-2025-49179
Install updates from vendor's website.