Vulnerability 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."
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c6
- https://jessie.cafe/posts/pwning-ladybirds-libjs/
- https://news.ycombinator.com/item?id=43852096
- https://jessie.cafe/posts/pwning-ladybirds-libjs/
FAQ
What is CVE-2025-47154?
CVE-2025-47154 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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...
How severe is CVE-2025-47154?
CVE-2025-47154 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-47154?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.