CVE-2019-15874 Use after free in FreeBSD

Critical 9.8 Published 28 Apr 2020 Updated 5 Aug 2024

Incomplete packet validation in FreeBSD kernel allows use-after-free, causing kernel panics and denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-15874?

CVE-2019-15874 is a critical use after free vulnerability in Freebsd Freebsd, published on 28 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In FreeBSD 12.1-STABLE before r356035, 12.1-RELEASE before 12.1-RELEASE-p4, 11.3-STABLE before r356036, and 11.3-RELEASE before 11.3-RELEASE-p8, incomplete packet data validation may result in memory access after it has been freed leading to a kernel panic or other unpredictable results.

Weakness: CWE-416, CWE-20

Which versions are affected by CVE-2019-15874?

It affects 2 products.

Products include Freebsd Freebsd, Netapp Clustered Data Ontap.

How do I fix CVE-2019-15874?

No fix has been published for CVE-2019-15874 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-15874 being exploited?

There is no known exploitation of CVE-2019-15874 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-q258-2fm4-mcj5.