CVE-2021-33454 Null dereference in n/a

Medium 5.5 Published 26 Jul 2022 Updated 3 Aug 2024

A NULL pointer dereference in the Yasm assembler library allows attackers to cause a 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: Available

What is CVE-2021-33454?

CVE-2021-33454 is a medium-severity vulnerability in n/a, published on 26 Jul 2022. 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

An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in yasm_expr_get_intnum() in libyasm/expr.c.

Weakness: CWE-476

Which versions are affected by CVE-2021-33454?

It affects 1 product.

Products include Tortall Yasm.

How do I fix CVE-2021-33454?

Apply the vendor's patch.

Is CVE-2021-33454 being exploited?

There is no known exploitation of CVE-2021-33454 in the wild and no public exploit code.

Sources

Also known as AZL-10324, AZL-35364, DEBIAN-CVE-2021-33454, GHSA-xc6r-vpp5-48cq, JLSEC-2026-584, ROOT-OS-ALPINE-318-CVE-2021-33454 and 1 more.