CVE-2024-3853 Use after free in Firefox

What is CVE-2024-3853?

CVE-2024-3853 is a high-severity use after free vulnerability in Mozilla Firefox, published on 16 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free could result if a JavaScript realm was in the process of being initialized when a garbage collection started. This vulnerability affects Firefox < 125.

Weakness: CWE-416

Which versions are affected by CVE-2024-3853?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2024-3853?

Upgrade to a fixed version.

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-2024-3853 being exploited?

There is no known exploitation of CVE-2024-3853 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-p6j5-jrmm-j3w6, UBUNTU-CVE-2024-3853.