Scene website dashhacks revealed a few days ago that Total_Noob has a (psp) kernel exploit that works on firmware 2.05.
Total_Noob never ceases to amaze, and he just explained that he has access to a (psp) Kernel exploit that works on the Vita firmware 2.05. As he described to dashhacks writer HolmesInFive, his upcoming TN-V (with XMB support) will work on 2.05 through a new kernel exploit, but he has no plan to release that exploit.
TN-V will be publicly released for firmwares up to 2.02, but no kernel exploit is publicly available for firmware 2.05 so far. People running on firmware 2.05 have currently no publicly known way to run (psp) homebrews, either through user or kernel mode. This includes obviously Total_Noob’s Custom firmware “CEF“.
PSP Kernel exploits have always been rare, and it makes sense that TN keeps this new one for his own investigation, assuming this is the only one he currently has access to. Who knows, maybe this will end up being released eventually.