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

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-17 · updated 2026-06-17
Weakness: CWE-404

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.

Affected products

Linux kernel: before 6.1 — fixed in 6.1

How to fix

Upgrade to a fixed version: Linux kernel 6.1. Check the vendor advisory for mitigations.

References

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=7a62ed61367b8fd01bae1e18e30602c25060d824
https://vuldb.com/?id.211043
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=7a62ed61367b8fd01bae1e18e30602c25060d824
https://vuldb.com/?id.211043

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