CVE-2025-47154 Use after free in Ladybird
Remote attackers can execute arbitrary code via crafted JavaScript files due to a use-after-free vulnerability in the Ladybird browser's LibJS engine.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-47154?
CVE-2025-47154 is a critical use after free vulnerability in Ladybird, published on 1 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LibJS in Ladybird before f5a6704 mishandles the freeing of the vector that arguments_list references, leading to a use-after-free, and allowing remote attackers to execute arbitrary code via a crafted .js file. NOTE: the GitHub README says "Ladybird is in a pre-alpha state, and only suitable for use by developers."
Weakness: CWE-820
Which versions are affected by CVE-2025-47154?
How do I fix CVE-2025-47154?
No fix has been published for CVE-2025-47154 yet. Limit exposure of the affected software until one is available.
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-2025-47154 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-47154 exists.
Sources
Also known as GHSA-g8g2-3hvq-w5f4.