CVE-2018-6925 Null dereference in FreeBSD

Medium 5.5 Published 28 Sep 2018 Updated 17 Sep 2024

A local unprivileged user can crash the FreeBSD kernel via a NULL pointer dereference in IPv6 protocol handling.

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-2018-6925?

CVE-2018-6925 is a medium-severity vulnerability in Freebsd Freebsd, published on 28 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In FreeBSD before 11.2-STABLE(r338986), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338985), and 10.4-RELEASE-p13, due to improper maintenance of IPv6 protocol control block flags through various failure paths, an unprivileged authenticated local user may be able to cause a NULL pointer dereference causing the kernel to crash.

Weakness: CWE-476

Which versions are affected by CVE-2018-6925?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2018-6925?

No fix has been published for CVE-2018-6925 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-6925 being exploited?

There is no known exploitation of CVE-2018-6925 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-jj47-9g63-xxj6.