I'm not sure why you're being downvoted, but I think you're right and this vulnerability comes to mind: "Forgotten" debugging registers enabled Triangulation e

I'm not sure why you're being downvoted, but I think you're right and this vulnerability comes to mind: "Forgotten" debugging registers enabled Triangulation exploit against iPhones: https://www.itnews.com.au/news/forgotten-debugging-registers-enabled-triangulation-exploit-against-iphones-603814 https://www.itnews.com.au/news/forgotten-debugging-registers... "While all of the vulnerabilities were zero-day bugs when patched, one attracted particular attention, because it turned out to be an undocumented hardware vulnerability. Larin described the bug as “insane”, saying it’s a hardware feature in Apple’s A12 to A16 Bionic system-on-chip (SoC). The feature, he said, allows attackers to “bypass the hardware-based kernel memory protection” in target iPhones, if they write data to “unknown memory-mapped input-output (MIMO) hardware registers” that Apple’s firmware doesn’t use. Larin said the research team found six undocumented MIMO addresses used by the Triangulation exploit, which “basically, bypass all hardware-based kernel memory protections”. He said they appear to be ARM/Apple CoreSight debug registers for GPUs, since they’re nearby identified MIMO registers. In a statement, Larin said that "due to the closed nature of the iOS ecosystem, the discovery process was both challenging and time-consuming.”