Mozilla developer Robert Kaiser (Kairo) reported that a race condition when initialization of a plugin fails led to a potentially exploitable use-after-free vulnerability. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2015-45/
Statement: Not vulnerable. This issue does not affect the version of Firefox and Thunderbird package, as shipped with Red Hat Enterprise Linux 5, 6 and 7.