What’s Vulnerable › Vulnerabilities
CVE-2026-93520: X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-28 · updated 2026-10-28
- Weakness: CWE-122
Description
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.
Affected products
- X.org xorg-x11-server: before 21.1.25 — fixed in 21.1.25
- X.Org xwayland: before 24.1.14 — fixed in 24.1.14
How to fix
Upgrade to a fixed version: X.org xorg-x11-server 21.1.25; X.Org xwayland 24.1.14. Check the vendor advisory for mitigations.
In the news
References
Get alerted when CVE-2026-93520 or the next vulnerability affects your stack