CVE-2024-3855 Memory corruption in Firefox
A JIT optimization flaw in Firefox allows out-of-bounds reads, potentially enabling code execution or crashes.
- 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
- Available
What is CVE-2024-3855?
CVE-2024-3855 is a medium-severity memory corruption vulnerability in Mozilla Firefox, published on 16 Apr 2024. 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
In certain cases the JIT incorrectly optimized MSubstr operations, which led to out-of-bounds reads. This vulnerability affects Firefox < 125.
Weakness: CWE-125
Which versions are affected by CVE-2024-3855?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2024-3855?
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-2024-3855 being exploited?
There is no known exploitation of CVE-2024-3855 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-xc8j-mr73-m6wv, UBUNTU-CVE-2024-3855.