Mastodawn

CVE-2026-50258 - Stack buffer overflow in X.org X server and Xwayland. Incomplete fix for CVE-2025-26597 allows crash or privilege escalation via excessive shift levels. CVSS 7.8. No patch available. Mitigate immediately. #CVE #Xorg #infosec

https://www.valtersit.com/cve/CVE-2026-50258/

CVE-2026-50258 | X.org | Valters IT Hub

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbd...

Valters IT Hub