CVE-2026-22987

kernel: Linux kernel: Denial of Service due to invalid dereference in networking scheduler during netns teardown

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · January 23, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's networking scheduler component (net/sched: act_api). A local user with low privileges could exploit this vulnerability during network namespace (netns) teardown. The tcf_idrinfo_destroy function incorrectly dereferences an error pointer, leading to a system crash (Denial of Service).

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-252 · Unchecked Return Value