CVE-2022-41860 Null dereference in freeradius

High 7.5 Published 17 Jan 2023 Updated 3 Nov 2025

An attacker can crash the FreeRADIUS server by sending an unknown EAP-SIM option, causing a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-41860?

CVE-2022-41860 is a high-severity vulnerability in freeradius, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In freeradius, when an EAP-SIM supplicant sends an unknown SIM option, the server will try to look that option up in the internal dictionaries. This lookup will fail, but the SIM code will not check for that failure. Instead, it will dereference a NULL pointer, and cause the server to crash.

Weakness: CWE-476

Which versions are affected by CVE-2022-41860?

It affects 1 product.

Products include Freeradius Freeradius.

How do I fix CVE-2022-41860?

Apply the vendor's patch.

Is CVE-2022-41860 being exploited?

There is no known exploitation of CVE-2022-41860 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2022-41860, AZL-13062, DEBIAN-CVE-2022-41860, GHSA-cfm7-f9p7-7m2w, UBUNTU-CVE-2022-41860.