CVE-2022-4128

kernel: mptcp: NULL pointer dereference in subflow traversal at disconnect time

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 11, 2022

Updated · November 21, 2025

Description

A NULL pointer dereference issue was discovered in the Linux kernel. This issue occurs in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could potentially crash the system, causing a 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-476 · NULL Pointer Dereference