xkb

About this tag
The xkb tag on WindowsForum.com covers discussions about the X Keyboard Extension, a component of the X.Org Server that manages keyboard layouts and input. Recent content highlights a critical vulnerability, CVE-2025-62231, which affects the XkbSetCompatMap function. This flaw can cause memory corruption, denial of service, and potential privilege escalation on systems running the X.Org X server or Xwayland. Topics include the technical details of the overflow bug, its impact on graphical services, and security implications for Linux and Unix-like environments. While primarily relevant to Linux, the tag may also interest Windows users running X11 forwarding or WSL with graphical applications.

  1. CVE-2025-62231: X.Org Xkb Overflow Triggers DoS and Potential Escalation

    A newly disclosed vulnerability in the X.Org Server’s X Keyboard (Xkb) extension — tracked as CVE‑2025‑62231 — allows a specially crafted X protocol request to trigger an arithmetic wrap/unsigned‑short overflow in XkbSetCompatMap, producing memory corruption or crashes that can fully deny...