ZDI-26-759: X.Org Server XKB TextDoodad Double Free 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-2026-88812.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Affected X.Org Server installations are exposed where an attacker can already execute low-privileged code locally on the system. It is a local privilege-escalation issue, not one described as remotely exploitable.
What does an attacker need before exploiting it?
The attacker must first obtain the ability to execute low-privileged code on the target system. The provided information does not identify any additional prerequisites or configuration requirements.
How severe is the issue?
ZDI assigned the vulnerability a CVSS score of 7.8. It can allow a local attacker with low-privileged code execution to escalate privileges.