CVE-2024-3857: Debian Linux

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 115.10 (fixed in 115.10); before 125.0 (fixed in 125.0)
• Mozilla Thunderbird: before 115.10 (fixed in 115.10)

Published 2024-04-16. Last modified 2026-06-17.