What’s Vulnerable › Vulnerabilities

CVE-2024-3856

• Severity: high (CVSS 8.8 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: 2024-04-16 · updated 2026-06-17
• Weakness: CWE-416

Description

A use-after-free could occur during WASM execution if garbage collection ran during the creation of an array. This vulnerability affects Firefox < 125.

Affected products

• Mozilla Firefox: before 125.0 — fixed in 125.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 125.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1885829
• https://www.mozilla.org/security/advisories/mfsa2024-18/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1885829
• https://www.mozilla.org/security/advisories/mfsa2024-18/

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