CVE-2025-47154

Public Exploit

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."

Category

9.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.23%
Affected: Ladybird Ladybird
Published at:
Updated at:

References

Link Tags
https://news.ycombinator.com/item?id=43852096
https://jessie.cafe/posts/pwning-ladybirds-libjs/
https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669

Frequently Asked Questions

What is the severity of CVE-2025-47154?
CVE-2025-47154 has been scored as a critical severity vulnerability.
How to fix CVE-2025-47154?
To fix CVE-2025-47154, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-47154 being actively exploited in the wild?
It is possible that CVE-2025-47154 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-47154?
CVE-2025-47154 affects Ladybird Ladybird.
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