ZDI-26-694: Linux Kernel Net Scheduler Clsact Qdisc Use-After-Free Local Privilege Escalation Vulnerability
Published Sep 14, 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 high-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.2. The following CVEs are assigned: CVE-2026-23413.
Affected Software
1 affected component
Linux Kernel
Event History
Sep 14, 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 first be able to execute high-privileged code on the target system. The available information does not describe a remote or unauthenticated exploitation path.
2
What is the security impact after successful exploitation?
Successful exploitation allows a local attacker to escalate privileges on an affected Linux Kernel installation. ZDI assigned the issue a CVSS rating of 8.2.