Linux Kernel Net Scheduler Qdisc Improper Validation of Array Index Local Privilege Escalation Vulnerability
Vulnerability Details
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 specific flaw exists within the taprio_enqueue function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated array. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.
Additional Details
Linux has issued an update to correct this vulnerability. More details can be found at:
https://github.com/torvalds/linux/commit/ea4d4b5dddb5121e64f56fd8e0720bd8b447b63d
Disclosure Timeline
- 2026-09-10 - Vulnerability reported to vendor
- 2026-11-13 - Coordinated public release of advisory
- 2026-11-13 - Advisory Updated
Credit
ELDEN
