Linux Kernel Net Scheduler True Link Equalizer Race Condition Local Privilege Escalation Vulnerability

August 13th, 2026
ZDI-26-569 ZDI-CAN-30840

CVE ID

CVSS Score

7.5 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Vendors

Linux

Affected Products

Kernel

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 high-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of qdisc objects. The issue results from the lack of proper locking when performing operations on an object. 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/e5b811fe793166aecc59b085c1b7c31262ef2316

Disclosure Timeline

  • 2026-06-17 - Vulnerability reported to vendor
  • 2026-08-13 - Coordinated public release of advisory
  • 2026-08-13 - Advisory Updated

Credit

Pitticus

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