CVE-2022-3586 Use after free in Linux Kernel

What is CVE-2022-3586?

CVE-2022-3586 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 19 Oct 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 networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.

Weakness: CWE-416

Which versions are affected by CVE-2022-3586?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2022-3586?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-3586 being exploited?

There is no known exploitation of CVE-2022-3586 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as AZL-11282, DEBIAN-CVE-2022-3586, GHSA-rvvq-r3qv-fpwc, UBUNTU-CVE-2022-3586.