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CVE-2026-93517

X.Org Server GLX RenderLarge Heap Buffer Overflow

HIGH
8.5
CVSS Score
Published: October 28, 2026 at 01:16 PM UTC
Updated: October 28, 2026 at 03:21 PM UTC
2 products affected across 2 vendorsXwaylandXorg X11-server

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Severity
HIGH8.5
Exploit prediction
EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xwayland· X Org
90%
All versions
Xorg X11-server· Red Hat
68%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Patch
Source: cverecord
https://gitlab.freedesktop.org/xorg/xserver/-/commit/2abe4632d793314d3d5f28c19583fb76019f5ce4

CVSS

8.5HIGHsuse
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-122

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