ZDI-26-766: X.Org Server RandR Heap-based Buffer Overflow Privilege Escalation Vulnerability
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-2026-93521.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Systems running affected installations of X.Org Server are exposed to local privilege escalation. The attacker must already be able to execute low-privileged code on the target system.
Can this vulnerability be exploited remotely without access to the system?
The available information describes this as a local attack. It does not indicate that remote exploitation without prior code execution on the target is possible.
What identifier should be used to track this vulnerability?
This issue is assigned CVE-2026-93521. ZDI also identifies it as ZDI-26-766.