CVE-2021-32495 Use after free in radare2

Critical 10.0 Published 7 Jul 2023 Updated 12 Nov 2024

Attackers can trigger a use-after-free in Radare2's pyc parser to read freed memory and cause 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-2021-32495?

CVE-2021-32495 is a critical use after free vulnerability in Radare Radare2, published on 7 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory afterwards. This will allow attackers to cause denial of service.

Weakness: CWE-416

Which versions are affected by CVE-2021-32495?

It affects 1 product.

Products include Radare Radare2.

How do I fix CVE-2021-32495?

No fix has been published for CVE-2021-32495 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-2021-32495 being exploited?

There is no known exploitation of CVE-2021-32495 in the wild and no public exploit code.

All Radare Radare2 vulnerabilities

Sources

Also known as GHSA-43pp-rgp9-c5h8, UBUNTU-CVE-2021-32495.