Use After Free in Mozilla Firefox
CVE-2024-3857
The JIT created incorrect code for arguments in certain cases. This led to potential use-after-free crashes during garbage collection. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
Vulnerability class: Use-After-Free
EPSS: 0.002 (15.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Debian_linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (Issue Tracking)
- security@mozilla.org (Mailing List, Third Party Advisory)
- security@mozilla.org (Mailing List, Third Party Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-3857?
- CVE-2024-3857 is a high-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 7.8/10. Published 2024-04-16.
- How severe is CVE-2024-3857?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2024-3857 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.