What’s Vulnerable › Vulnerabilities
CVE-2026-93517: X.Org Server GLX RenderLarge Heap Buffer Overflow
- Severity: high (CVSS 8.5 v4.0)
- 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 in handling GLX RenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server context.
Affected products
- X.Org xwayland: before 24.1.14 — fixed in 24.1.14
- x.orgg xorg-x11-server: before 21.1.25 — fixed in 21.1.25
How to fix
Upgrade to a fixed version: X.Org xwayland 24.1.14; x.orgg xorg-x11-server 21.1.25. Check the vendor advisory for mitigations.
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References
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