#VU111226 Out-of-bounds read in X.org Server and Xwayland - CVE-2025-49175

Vulnerability identifier: #VU111226

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49175

CWE-ID: CWE-125

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 gain access to sensitive information.

The vulnerability exists due to a boundary condition in X Rendering extension (Animated cursors). A local user can trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

X.org Server: 21.0.99.1 - 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/0885e0b2

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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.