Xwayland CVE-2025-62229-31 Fixes Local Privilege Escalation Bugs
X.Org Server & Xwayland CVE-2025-62229-31 Security Fix Released
The X.Org project has released new security updates addressing several high-impact vulnerabilities in X.Org Server 21.2.5 and Xwayland 23.2.6. These flaws could allow local privilege escalation or crashes on affected Linux systems if exploited.
Vulnerabilities
The update resolves three distinct security issues:
- CVE-2025-62229 – A use-after-free vulnerability in the
ProcXkbSetGeometryfunction, potentially leading to memory corruption and local code execution. - CVE-2025-62230 – An integer overflow in
XkbSetNames, which could trigger heap buffer overflows under crafted conditions. - CVE-2025-62231 – Another use-after-free in the XInput extension that could allow local attackers to crash or hijack processes.
While these issues require local access to the machine, exploitation could let a low-privileged user escalate privileges or disrupt system stability.
Affected Versions
- X.Org Server versions prior to 21.2.5
- Xwayland versions prior to 23.2.6
Distributions such as Ubuntu, Fedora, Debian, and Arch Linux are expected to push patched packages shortly. System administrators are advised to apply updates immediately to mitigate potential risks.
Developer Response
According to the official X.Org advisory, the fixes have been included in the latest stable releases available from the X.Org repository. The maintainers recommend all users and Linux distributions update as soon as possible to ensure continued system integrity.
Summary
These flaws demonstrate that even long-standing components of the Linux desktop stack can expose systems to risk when left unpatched. Keeping graphical stack components like X.Org Server and Xwayland up to date remains essential to maintaining a secure Linux environment.
