CVE-2021-46463 Memory corruption in n/a

Critical 9.8 Published 14 Feb 2022 Updated 4 Aug 2024

A type confusion vulnerability in the njs module allows attackers to hijack control flow, potentially leading to code execution or 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-2021-46463?

CVE-2021-46463 is a critical memory corruption vulnerability in n/a, published on 14 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njs_promise_perform_then().

Weakness: CWE-843

Which versions are affected by CVE-2021-46463?

It affects 1 product.

Products include F5 Njs.

How do I fix CVE-2021-46463?

Upgrade to a fixed version.

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

Is CVE-2021-46463 being exploited?

There is no known exploitation of CVE-2021-46463 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2021-46463, CLEANSTART-2026-ML28121, GHSA-rcr4-6fgm-fjc6.