CVE-2015-0817: Mozilla Firefox

Medium severity, CVSS 6.8. EPSS: 3.7% chance of exploitation in the next 30 days.

The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly determine the cases in which bounds checking may be safely skipped during JIT compilation and heap access, which allows remote attackers to read or write to unintended memory locations, and consequently execute arbitrary code, via crafted JavaScript.

Affected products

• Mozilla Firefox: up to and including 36.0.1; version 31.0 only; version 31.1.0 only; version 31.1.1 only; version 31.3.0 only; version 31.5.1 only
• Mozilla Firefox ESR: version 31.1 only; version 31.2 only; version 31.3 only; version 31.4 only; version 31.5 only
• Mozilla Seamonkey: up to and including 2.33.0

Published 2015-03-24. Last modified 2026-06-17.