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Findings

Vulnerability · CVE-2024-9680

Mozilla Firefox Use-After-Free Vulnerability

Published Oct 9, 2024 · corrected/updated Aug 3, 2026 · Mozilla Firefox · evidence confidence very high

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.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2024-9680 is a critical public vulnerability record for Mozilla Firefox. CISA lists it as known exploited. Published remediation guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Mozilla Firefox is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: debian/debian linux (11.0); mozilla/firefox; mozilla/thunderbird; mozilla/thunderbird (131.0). Published remediation guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 9.8, EPSS 23.2%. CISA lists it as known exploited. Weakness classes: CWE-416. Sources contributing to this record: cisa_kev, cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Oct 9, 2024. Listed in CISA KEV and VulnCheck KEV.

  • Patch and remediation

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

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

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.

Affected

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

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