A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
Fix
Vendor advisories in the News 1
- ZDI-26-765: X.Org Server XKB Heap-based Buffer Overflow Privilege Escalation Vulnerability Zero Day Initiative: published advisories · 2026-10-15
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 2
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-28 14:59
- First seenCVSS 7.8NVD modified 2026-10-28 15:21
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.