CVE-2015-2712: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 3.6% chance of exploitation in the next 30 days.

The asm.js implementation in Mozilla Firefox before 38.0 does not properly determine heap lengths during identification of cases in which bounds checking may be safely skipped, which allows remote attackers to trigger out-of-bounds write operations and possibly execute arbitrary code, or trigger out-of-bounds read operations and possibly obtain sensitive information from process memory, via crafted JavaScript.

Affected products

• Mozilla Firefox: up to and including 37.0.2
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2015-05-14. Last modified 2026-06-17.