AZL-113834: CVE-2026-109904 affecting package xorg-x11-server-Xwayland 24.1.14-1

Q: Who can exploit this vulnerability?

An attacker must be able to act as an authenticated X client. Systems without untrusted or attacker-controlled authenticated X clients are less directly exposed.

Q: What impact could successful exploitation have?

Successful exploitation could crash the X server or leak information from it due to a buffer overread.

Q: Which upstream versions are affected?

X.Org Xwayland versions before 24.1.15 are affected, as are X Server versions before 21.1.26.

Published Nov 13, 2026

Updated

A buffer overread caused by an integer-overflow in Proc/SProcXResQueryClientIds in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by attackers on authenticated X clients to crash the server or leak out information.

Affected Software

1 affected component

azure-linux/xorg-x11-server-xwayland<=24.1.14-1

Event History

Nov 13, 2026

Advisory Published

via OSV·11:17 AM

Data Sourced

via OSV·11:17 AM

DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-109904

Frequently Asked Questions

Who can exploit this vulnerability?

An attacker must be able to act as an authenticated X client. Systems without untrusted or attacker-controlled authenticated X clients are less directly exposed.

What impact could successful exploitation have?

Successful exploitation could crash the X server or leak information from it due to a buffer overread.

Which upstream versions are affected?

X.Org Xwayland versions before 24.1.15 are affected, as are X Server versions before 21.1.26.

AZL-113834: CVE-2026-109904 affecting package xorg-x11-server-Xwayland 24.1.14-1

Affected Software

Event History

Child vulnerabilities

Frequently Asked Questions

Who can exploit this vulnerability?

What impact could successful exploitation have?

Which upstream versions are affected?

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Frequently Asked Questions

Who can exploit this vulnerability?

What impact could successful exploitation have?

Which upstream versions are affected?