CVE-2023-31725 Use after free in n/a

Medium 5.5 Published 17 May 2023 Updated 22 Jan 2025

A heap-use-after-free in Yasm allows attackers to execute arbitrary code or cause denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-31725?

CVE-2023-31725 is a medium-severity use after free vulnerability in n/a, published on 17 May 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

yasm 1.3.0.55.g101bc was discovered to contain a heap-use-after-free via the function expand_mmac_params at yasm/modules/preprocs/nasm/nasm-pp.c.

Weakness: CWE-416

Which versions are affected by CVE-2023-31725?

It affects 1 product.

Products include Yasm Project Yasm.

How do I fix CVE-2023-31725?

No fix has been published for CVE-2023-31725 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-2023-31725 being exploited?

There is no known exploitation of CVE-2023-31725 in the wild and no public exploit code.

Sources

Also known as AZL-26738, AZL-35391, DEBIAN-CVE-2023-31725, GHSA-v8xh-gh45-h3h5, UBUNTU-CVE-2023-31725.