#VU111231 Integer overflow in X.org Server and Xwayland - CVE-2025-49180

Vulnerability identifier: #VU111231

Vulnerability risk: Low

CVSSv4.0: 5.9 [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-2025-49180

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
X.org Server
Server applications / Other server solutions
Xwayland
Client/Desktop applications / Multimedia software

Vendor: X.org

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the RRChangeProviderProperty() function in RandR extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

X.org Server: 1.17.0 - 21.1.16

Xwayland: 21.0.99.901 - 24.1.6

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External links
https://www.openwall.com/lists/oss-security/2025/06/17/3
https://gitlab.freedesktop.org/xorg/xserver/-/commit/3c3a4b76
https://gitlab.freedesktop.org/xorg/xserver/-/commit/0235121c

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.