CVE-2026-50259
CVE-2026-50259
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. _XkbSetMapChecks() declares a fixed-size stack buffer mapWidths[256] indexed by key type index. The helper function CheckKeyTypes() writes to this buffer at a…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-50259?
- CVE-2026-50259 is a high-severity vulnerability, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-06-05.
- How severe is CVE-2026-50259?
- High severity. CVSS v3 base score is 7.8 out of 10.