ZDI-CAN-31938: ZDI-26-764: X.Org Server XFixes Pointer Barrier Heap-based Buffer Overflow Privilege Escalation Vulnerability
Published Oct 15, 2026
·Updated
This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-93519.
Affected Software
1 affected component
X.Org X.Org Server
Event History
Oct 15, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
Who is exposed to this vulnerability?
Affected X.Org Server installations are exposed to local attackers who can already execute low-privileged code on the target system. The issue can be used to escalate privileges.
2
Does exploitation require remote access or prior code execution?
The available information describes this as a local privilege-escalation vulnerability. An attacker must first obtain the ability to run low-privileged code on the affected system.
3
Which CVE identifies this issue?
This vulnerability is assigned CVE-2026-93519.