CVE-2022-34480 Use after free in Firefox
An uninitialized pointer free in Firefox can lead to crashes or potential code execution, requiring users to upgrade to version 102 or later.
- 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-2022-34480?
CVE-2022-34480 is a high-severity use after free vulnerability in Mozilla Firefox, published on 22 Dec 2022. 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
Within the <code>lg_init()</code> function, if several allocations succeed but then one fails, an uninitialized pointer would have been freed despite never being allocated. This vulnerability affects Firefox < 102.
Weakness: CWE-824
Which versions are affected by CVE-2022-34480?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2022-34480?
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-2022-34480 being exploited?
There is no known exploitation of CVE-2022-34480 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as CLSA-2023-1677783628, CLSA-2023-1677783798, CLSA-2023-1677784062, GHSA-gx64-jm35-rwvr, UBUNTU-CVE-2022-34480.