CVE-2021-26199 Use after free in n/a

Medium 6.5 Published 10 Jun 2021 Updated 3 Aug 2024

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

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-26199?

CVE-2021-26199 is a medium-severity use after free vulnerability in Jerryscript Jerryscript, published on 10 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_bytecode_ref in ecma-helpers.c file.

Weakness: CWE-416

Which versions are affected by CVE-2021-26199?

It affects 1 product.

Products include Jerryscript Jerryscript.

How do I fix CVE-2021-26199?

No fix has been published for CVE-2021-26199 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-2021-26199 being exploited?

There is no known exploitation of CVE-2021-26199 in the wild and no public exploit code.

All Jerryscript Jerryscript vulnerabilities

Sources

Also known as GHSA-xg7p-g635-vrg9, UBUNTU-CVE-2021-26199.