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Vulnerabilities

Vulnerability · CVE-2025-47154

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 arbitrar

Published May 1, 2025 · catalog updated May 1, 2025 · Ladybird Ladybird

Check if you run it

No confirmed exploitation is on record for CVE-2025-47154. EPSS is 0.68%. Act only if a listed version of Ladybird Ladybird is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.68%
Remediation
Version ranges on file
Affected products
vendor Ladybird Ladybird 0 <f5a670421954fc7130c3685b713c621b29516669

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."

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Ladybird Ladybird 0 <f5a670421954fc7130c3685b713c621b295166690 <f5a670421954fc7130c3685b713c621b29516669

How to fix CVE-2025-47154

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-47154. EPSS is 0.68%. Act only if a listed version of Ladybird Ladybird is installed.

Which versions are affected?

Compare what you have installed with Ladybird Ladybird 0 <f5a670421954fc7130c3685b713c621b29516669 0 <f5a670421954fc7130c3685b713c621b29516669. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.68%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 1, 2025 · EUVD

    Detected

    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."

  2. May 1, 2025 · EUVD

    Updated

    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."

Sources

  • CVE.orgVulnerability recordCVE-2025-47154

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-47154

    30-day exploitation probability 0.7%

    first.org
  • EUVDVulnerability recordEUVD-2025-14653

    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 o

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.