ZDI-CAN-31221: ZDI-26-759: X.Org Server XKB TextDoodad Double Free 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-2026-88812.
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
What level of access does an attacker need before exploiting this issue?
The attacker must already be able to execute low-privileged code on the affected system. The issue is described as a local privilege-escalation vulnerability.