Adobe Security Bulletin APSB15-19 for Adobe Flash Player describes the following issue: These updates include further hardening to a mitigation introduced in version 18.0.0.209 to defend against vector length corruptions (CVE-2015-5125). This mitigation is likely not relevant to the Linux version of Adobe Flash Player, and thus the hardening does not apply to the Linux version as well. External References: https://helpx.adobe.com/security/products/flash-player/apsb15-19.html
Statement: This issue did not affect the versions of flash-plugin as shipped with Red Hat Enterprise Linux 5 and 6.