CVE-2023-49556 Memory corruption in n/a

Medium 5.5 Published 2 Jan 2024 Updated 3 Jun 2025

A buffer overflow in the YASM library allows remote attackers to cause a denial of service via the expr_delete_term function.

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-2023-49556?

CVE-2023-49556 is a medium-severity memory corruption vulnerability in n/a, published on 2 Jan 2024. 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

Buffer Overflow vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expr_delete_term function in the libyasm/expr.c component.

Weakness: CWE-120

Which versions are affected by CVE-2023-49556?

It affects 1 product.

Products include Yasm Project Yasm.

How do I fix CVE-2023-49556?

No fix has been published for CVE-2023-49556 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-49556 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-49556 exists.

Sources

Also known as AZL-33355, AZL-35388, DEBIAN-CVE-2023-49556, GHSA-q795-pwf5-9r9x, UBUNTU-CVE-2023-49556.