CVE-2022-4128 Null dereference in Linux kernel (mptcp)

What is CVE-2022-4128?

CVE-2022-4128 is a medium-severity vulnerability in Linux kernel, published on 28 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2022-4128?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-4128?

Apply the vendor's patch.

Is CVE-2022-4128 being exploited?

There is no known exploitation of CVE-2022-4128 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-4128, GHSA-4v8v-pr95-rhx7, UBUNTU-CVE-2022-4128.