CVE-2022-4129 Race condition in Linux kernel (l2tp)

What is CVE-2022-4129?

CVE-2022-4129 is a medium-severity vulnerability in Fedoraproject Fedora, 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 flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.

Weakness: CWE-667

Which versions are affected by CVE-2022-4129?

It affects 2 products.

Products include Fedoraproject Fedora, Linux Layer 2 Tunneling Protocol.

How do I fix CVE-2022-4129?

Apply the vendor's patch.

Is CVE-2022-4129 being exploited?

There is no known exploitation of CVE-2022-4129 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2022-4129, GHSA-6hvc-j4m8-jp74, OESA-2022-2141, OESA-2022-2142, UBUNTU-CVE-2022-4129.