CVE-2021-39516 Null dereference in n/a

Medium 6.5 Published 20 Sep 2021 Updated 4 Aug 2024

A NULL pointer dereference in libjpeg allows attackers to cause a denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-39516?

CVE-2021-39516 is a medium-severity vulnerability in n/a, published on 20 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function HuffmanDecoder::Get() located in huffmandecoder.hpp. It allows an attacker to cause Denial of Service.

Weakness: CWE-476

Which versions are affected by CVE-2021-39516?

It affects 1 product.

Products include Jpeg Libjpeg.

How do I fix CVE-2021-39516?

Apply the vendor's patch.

Is CVE-2021-39516 being exploited?

There is no known exploitation of CVE-2021-39516 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2021-39516, GHSA-gf8p-pg5p-7jm3, UBUNTU-CVE-2021-39516.