CVE-2026-99025

kernel: openvswitch: fix soft lockup in the netlink flow dump

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Severity

Moderate

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Open vSwitch component. A local attacker can cause a Denial of Service (DoS) by initiating a Netlink flow dump while the system is processing heavy network traffic. In this scenario, the dumping thread repeatedly processes pending software interrupts without yielding CPU execution time, triggering a kernel soft lockup and subsequent system crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')