Mozilla Firefox Use-After-Free Vulnerability

Are you affected?

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• cpe debian/debian linux11.0
• cpe mozilla/firefoxversion unspecified
• cpe mozilla/thunderbird131.0
• vendor Mozilla Firefoxversion unspecified

How to fix CVE-2024-9680

• Recommended remediation

  Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA due date Nov 5, 2024.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

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

Code

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

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 9, 2024 · Catalog

   Detected

   An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

2. Oct 15, 2024 · CISA KEV

   Known exploited

   Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

3. Nov 5, 2024 · CISA KEV

   Remediation due

   Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

4. Aug 3, 2026 · Catalog

   Updated

   An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

Sources

• CISA KEVConfirmed exploitationCVE-2024-9680

  Mozilla Firefox and Firefox ESR contain a use-after-free vulnerability in Animation timelines that allows for code execution in the content process.

  cisa.gov
• CVE.orgVulnerability recordCVE-2024-9680

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2024-9680

  30-day exploitation probability 23.2%

  first.org
• NIST NVDVulnerability recordCVE-2024-9680

  An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 1

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2024-9680

  Mozilla Firefox and Firefox ESR contain a use-after-free vulnerability in Animation timelines that allows for code execution in the content process.

  vulncheck.com

References

• VulnCheck exploitation evidence · blog.mozilla.org
• Issue Tracking · bugs.freebsd.org
• Issue Tracking · bugzilla.mozilla.org
• VulnCheck exploitation evidence · docs.google.com
• Mailing List · lists.debian.org
• Mailing List · lists.debian.org
• Not Applicable · msrc.microsoft.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov
• VulnCheck exploitation evidence · cisa.gov
• VulnCheck exploitation evidence · cve.org
• VulnCheck exploitation evidence · eset.com
• CISA note · mozilla.org
• Vendor Advisory · mozilla.org
• Vendor Advisory · mozilla.org

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.