CVE-2022-3586: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: from 2.6.39, up to and including 5.19; version 6.0 only

Published 2022-10-19. Last modified 2026-06-17.