Linux Kernel OpenvSwitch Race Condition Local Privilege Escalation Vulnerability

September 14th, 2026
ZDI-26-688 ZDI-CAN-31642

CVE ID

CVE-2026-74465

CVSS Score

7.8 AV:L/AC:H/PR:L/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 low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of dp_meter 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/a58a2b0ce354df531ebc71fc870058c2feb59f6b

Disclosure Timeline

  • 2026-07-21 - Vulnerability reported to vendor
  • 2026-09-14 - Coordinated public release of advisory
  • 2026-09-14 - Advisory Updated

Credit

Anonymous

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