ZDI-CAN-31833: ZDI-26-762: X.Org Server GLX RenderLarge 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-2026-93517.
Affected Software
1 affected component
X.Org Foundation 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 when an attacker can already execute low-privileged code on the system. This is a local privilege-escalation issue, not one described as remotely exploitable.
2
What does an attacker need to exploit it?
The attacker must first obtain the ability to run code with low privileges on the target system. The provided information does not identify any additional prerequisites or configuration requirements.