What’s Vulnerable › Vulnerabilities

CVE-2024-8385

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-03 · updated 2026-06-17
• Weakness: CWE-843

Description

A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Affected products

• Mozilla Firefox: before 130.0 — fixed in 130.0
• Mozilla Firefox ESR: before 128.2 — fixed in 128.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 130.0; Mozilla Firefox ESR 128.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1911909
• https://www.mozilla.org/security/advisories/mfsa2024-39/
• https://www.mozilla.org/security/advisories/mfsa2024-40/
• https://www.mozilla.org/security/advisories/mfsa2024-43/

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