On Samsung mobile devices with O(8.0) and P(9.0) software and an Exynos 8895 chipset, RKP (aka the Samsung Hypervisor EL2 implementation) allows arbitrary memory write operations. The Samsung ID is SVE-2019-16265.
https://security.samsungmobile.com/securityUpdate.smsb
https://census-labs.com/news/2020/10/08/samsung-hypervisor-rkp-arbitrary-zero-write/