CVE-2020-7462

Name of the Vulnerable Software and Affected Versions: FreeBSD versions 11.3-RELEASE before p13 FreeBSD versions 11.4-PRERELEASE before r360733

Description: The issue is caused by improper mbuf handling in the kernel, leading to a use-after-free bug when sending IPv6 Hop-by-Hop options over the loopback interface. This may result in unintended kernel behavior, including a kernel panic.

Recommendations: For FreeBSD versions 11.3-RELEASE before p13, update to p13 or later to resolve the issue. For FreeBSD versions 11.4-PRERELEASE before r360733, update to r360733 or later to resolve the issue. As a temporary workaround, consider restricting the use of IPv6 Hop-by-Hop options over the loopback interface until a patch is available.