CVE-2022-4128

Name: CVE-2022-4128
Creator: NVD / NIST
Published: 2022-11-28T22:15:11.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2022-4128 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A NULL pointer dereference issue was discovered in the Linux kernel in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could use this flaw to potentially crash the system causing a denial of service.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

A NULL pointer dereference issue was discovered in the Linux kernel in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could use this flaw to potentially crash the system causing a denial of service.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.24%

14.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	>= 5.17, <= 5.18	—
Linux	Linux Kernel	5.19	Rc1

References

https://github.com/torvalds/linux/commit/5c835bb142d4Patch, Vendor Advisory
https://lore.kernel.org/netdev/20220708233610.410786-2-mathew.j.martineau%40linux.intel.com/Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/5c835bb142d4Patch, Vendor Advisory
https://lore.kernel.org/netdev/20220708233610.410786-2-mathew.j.martineau%40linux.intel.com/Patch, Vendor Advisory

Timeline

Published: Nov 28, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-4128?

How severe is CVE-2022-4128?

CVE-2022-4128 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2022-4128?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-4128?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST