CVE-2026-93517

X.Org Server GLX RenderLarge Heap Buffer Overflow

State: Published
Severity: 8.5 High
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 18, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	suse

Weaknesses

CWE-122 Heap-based buffer overflow

Affected Products

Product	Versions
xorg-x11-serverx.orgg	before 21.1.25Affected
xwaylandx.org	before 24.1.14Affected

References

https://gitlab.freedesktop.org/xorg/xserver/-/commit/2abe4632d793314d3d5f28c19583fb76019f5ce4patch

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