Security Advisory
CVE-2019-9792
9.8
CRITICAL
Vulnerability Description
The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Published Date
April 26, 2019
Official Source
NIST NVD Advisory