CVE-2022-3543 Linux Kernel BPF af_unix.c unix_release_sock memory leak

What is CVE-2022-3543?

CVE-2022-3543 is a low-severity denial of service vulnerability in Linux kernel, published on 17 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability, which was classified as problematic, has been found in Linux Kernel. This issue affects the function unix_sock_destructor/unix_release_sock of the file net/unix/af_unix.c of the component BPF. The manipulation leads to memory leak. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211043.

Weakness: CWE-401, CWE-404

Which versions are affected by CVE-2022-3543?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-3543?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-3543 being exploited?

There is no known exploitation of CVE-2022-3543 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 AZL-11134, DEBIAN-CVE-2022-3543, GHSA-qrjf-69q3-8pqj, UBUNTU-CVE-2022-3543.