CVE-2020-7462: Freebsd

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.

Affected products

• Freebsd Freebsd: version 11.3 only; version 11.4 only

Published 2021-03-26. Last modified 2026-06-17.