CVE-2024-3857 Use after free in Firefox
A JIT compiler bug in Firefox and Thunderbird can cause use-after-free crashes, potentially allowing attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-3857?
CVE-2024-3857 is a high-severity use after free vulnerability in Debian Debian Linux, 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
The JIT created incorrect code for arguments in certain cases. This led to potential use-after-free crashes during garbage collection. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
Weakness: CWE-416
Which versions are affected by CVE-2024-3857?
It affects 3 products.
Products include Debian Debian Linux, Mozilla Firefox, Mozilla Thunderbird.
How do I fix CVE-2024-3857?
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-2024-3857 being exploited?
There is no known exploitation of CVE-2024-3857 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2024-3857, GHSA-8564-m639-jh8r, UBUNTU-CVE-2024-3857.