CVE-2021-33390 Use after free in n/a

Critical 9.8 Published 22 Aug 2023 Updated 3 Oct 2024

A use-after-free vulnerability in the dpic compiler allows attackers to potentially execute arbitrary code or cause 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-2021-33390?

CVE-2021-33390 is a critical use after free vulnerability in n/a, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

dpic 2021.04.10 has a use-after-free in thedeletestringbox() function in dpic.y. A different vulnerablility than CVE-2021-32421.

Weakness: CWE-416

Which versions are affected by CVE-2021-33390?

It affects 1 product.

Products include Dpic Project Dpic.

How do I fix CVE-2021-33390?

Upgrade to a fixed version.

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-2021-33390 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-33390 exists.

Sources

Also known as DEBIAN-CVE-2021-33390, GHSA-mg3r-fx4q-5fg2, UBUNTU-CVE-2021-33390.