Known exploited · Mozilla
CVE-2024-9680: Mozilla Firefox Use-After-Free Vulnerability
What it is
Mozilla Firefox and Firefox ESR contain a use-after-free vulnerability in Animation timelines that allows for code execution in the content process.
- Vendor
- Mozilla
- Product
- Firefox
- Added to KEV
- October 15, 2024
- CISA due date
- November 5, 2024
- Ransomware use
- Known
- Weakness
- CWE-416: Use After Free
What CISA requires
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Forensic triage
No
What to do now
- Find every instance of Firefox you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before November 5, 2024 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
Not sure you are clear?
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Train the engineers who fix it
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Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.