What’s Vulnerable › Vulnerabilities

CVE-2024-4764

• 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: yes
• Published: 2024-05-14 · updated 2026-06-17
• Weakness: CWE-416

Description

Multiple WebRTC threads could have claimed a newly connected audio input leading to use-after-free. This vulnerability affects Firefox < 126.

Affected products

• Mozilla Firefox: before 126.0 — fixed in 126.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 126.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1879093
• https://www.mozilla.org/security/advisories/mfsa2024-21/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1879093
• https://www.mozilla.org/security/advisories/mfsa2024-21/

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