CVE-2018-6921 Information disclosure in FreeBSD

Medium 5.5 Published 8 May 2018 Updated 17 Sep 2024

Unprivileged local users can read small amounts of privileged kernel memory due to insufficient initialization in the FreeBSD network subsystem.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-6921?

CVE-2018-6921 is a medium-severity vulnerability in Freebsd Freebsd, published on 8 May 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In FreeBSD before 11.1-STABLE(r332066) and 11.1-RELEASE-p10, due to insufficient initialization of memory copied to userland in the network subsystem, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts of privileged kernel data.

Weakness: CWE-200

Which versions are affected by CVE-2018-6921?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2018-6921?

No fix has been published for CVE-2018-6921 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-6921 being exploited?

There is no known exploitation of CVE-2018-6921 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-6333-fqg8-qwf8.