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It is worth noting this Memory Tagging Extensions feature is a massive security improvement and has been planned for years in advance.
2021: https://nitter.net/GrapheneOS/status/135543282245507891 and 2022: https://nitter.net/GrapheneOS/status/1501158678455586817
Here is an explanation on how it works: https://source.android.com/docs/security/test/memory-safety/arm-mte - I'm not very knowledgeable on memory safety but overall it makes exploitation even harder than it already is.
GrapheneOS is shipping support for it while it is a disabled, unstable development feature in stock Android. In the meantime GrapheneOS want to work on improving beyond the standard implementation as well.
It is worth noting this Memory Tagging Extensions feature is a massive security improvement and has been planned for years in advance.
2021: https://nitter.net/GrapheneOS/status/135543282245507891 and 2022: https://nitter.net/GrapheneOS/status/1501158678455586817
Here is an explanation on how it works: https://source.android.com/docs/security/test/memory-safety/arm-mte - I'm not very knowledgeable on memory safety but overall it makes exploitation even harder than it already is.
GrapheneOS is shipping support for it while it is a disabled, unstable development feature in stock Android. In the meantime GrapheneOS want to work on improving beyond the standard implementation as well.