In Android 11 we continue to increase the security of the Android platform. We have moved to safer default settings, migrated to a hardened memory allocator, and expanded the use of compiler mitigations that defend against classes of vulnerabilities and frustrate exploitation techniques. Weve enabled forms of automatic memory initialization in both Android 11s userspace and the Linux kernel. These features enforce initialization of local variables and heap allocations with known values that cannot be controlled by attackers and are useless when leaked.”]
Source: https://security.googleblog.com/2020/06/system-hardening-in-android-11.html