CVE-2020-24385 Null dereference in n/a

Medium 5.5 Published 3 Sep 2020 Updated 4 Aug 2024

Attackers can crash the kernel via a NULL pointer dereference in the Linux emulation layer of MidnightBSD and FreeBSD.

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-2020-24385?

CVE-2020-24385 is a medium-severity vulnerability in Freebsd Freebsd, published on 3 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().

Weakness: CWE-476

Which versions are affected by CVE-2020-24385?

It affects 2 products.

Products include Freebsd Freebsd, Midnightbsd Midnightbsd.

How do I fix CVE-2020-24385?

No fix has been published for CVE-2020-24385 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-24385 being exploited?

There is no known exploitation of CVE-2020-24385 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-p9x8-8fhr-66mg.