ZDI-26-623: Linux Kernel IPv6 Multicast Routing Use-After-Free Local Privilege Escalation Vulnerability
Published Sep 9, 2026
·Updated
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. 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 8.8.
Affected Software
1 affected component
Linux Linux kernel
Event History
Sep 9, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
Who is exposed to exploitation?
Affected Linux Kernel installations are exposed only to attackers who can already execute low-privileged code locally on the target system. The disclosed impact is local privilege escalation.
2
Does exploitation require prior access?
Yes. An attacker must first obtain the ability to run low-privileged code on the affected system; the provided information does not describe remote exploitation.