AZL-111458: CVE-2026-93521 affecting package xorg-x11-server 1.20.10-6

Q: Who can exploit this issue?

An attacker needs to be an authenticated X client. The issue affects environments running a vulnerable X.Org X Server or XWayland instance that accepts RandR ChangeProviderProperty requests from that client.

Q: What is the potential impact of successful exploitation?

A successful attack could crash the X server or execute code in the X server's context.

Q: Which upstream versions are affected?

The issue affects X.Org X Server versions before 2.1.25 and XWayland versions before 24.4.14.

Published Oct 28, 2026

Updated

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 Software

1 affected component

azure-linux/xorg-x11-server<=1.20.10-6

Event History

Oct 28, 2026

Advisory Published

via OSV·04:17 PM

Data Sourced

via OSV·04:17 PM

DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-93521

Frequently Asked Questions

Who can exploit this issue?

An attacker needs to be an authenticated X client. The issue affects environments running a vulnerable X.Org X Server or XWayland instance that accepts RandR ChangeProviderProperty requests from that client.

What is the potential impact of successful exploitation?

A successful attack could crash the X server or execute code in the X server's context.

Which upstream versions are affected?

The issue affects X.Org X Server versions before 2.1.25 and XWayland versions before 24.4.14.

AZL-111458: CVE-2026-93521 affecting package xorg-x11-server 1.20.10-6

Affected Software

Event History

Child vulnerabilities

Frequently Asked Questions

Who can exploit this issue?

What is the potential impact of successful exploitation?

Which upstream versions are affected?

Company

Resources

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Frequently Asked Questions

Who can exploit this issue?

What is the potential impact of successful exploitation?

Which upstream versions are affected?