What’s Vulnerable › Vulnerabilities
CVE-2026-93521: X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
- 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 2026-10-29
- Weakness: CWE-122
Description
A buffer overflow in RandR ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14 could be used by authenticated X clients to crash or execute code within the 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
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