CVE-2024-7527 Use after free in Firefox
A use-after-free vulnerability in Firefox and Thunderbird could allow attackers to execute arbitrary code via unexpected marking work during garbage collection.
- 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-2024-7527?
CVE-2024-7527 is a high-severity use after free vulnerability in Mozilla Firefox, published on 6 Aug 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
Unexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.
Weakness: CWE-416
Which versions are affected by CVE-2024-7527?
It affects 3 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2024-7527?
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-2024-7527 being exploited?
There is no known exploitation of CVE-2024-7527 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2024-7527, GHSA-69x6-6jqx-q847, UBUNTU-CVE-2024-7527.