ZDI-23-898: (Pwn2Own) Canonical Ubuntu tcindex Double-Free Local Privilege Escalation Vulnerability
First published: Thu Jul 06 2023(Updated: )
This vulnerability allows local attackers to escalate privileges on affected installations of Canonical Ubuntu. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the tcindex module. The issue results from the lack of validating the existence of an object prior to performing further free operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
| Affected Software | Affected Version | How to fix |
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Reference Links
Frequently Asked Questions
What is ZDI-23-898?
ZDI-23-898 is a vulnerability that allows local attackers to escalate privileges on affected installations of Canonical Ubuntu.
How severe is ZDI-23-898?
ZDI-23-898 has a severity rating of 7.8, which is considered high.
What is the affected software for ZDI-23-898?
ZDI-23-898 affects installations of Canonical Ubuntu.
How can ZDI-23-898 be exploited?
To exploit ZDI-23-898, an attacker must first obtain the ability to execute low-privileged code on the target system.
Where can I find more information about ZDI-23-898?
You can find more information about ZDI-23-898 on the Zero Day Initiative website and the Linux kernel repository.
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