After a long RE + debugging session, finally reached a much clearer understanding of a kernel-space memory corruption primitive on PS4 FW 13.50. Still quite a journey ahead for stable exploitation, but mapping the primitive's constraints was the hardest part. #ps4 #jailbreak

Update: Sony appears to have fixed the PS4 exFAT UpCase table bug I reported. The new firmware adds a pre-roundup overflow check before allocating the UpCase buffer, blocking the integer-wrap path that led to kernel heap corruption on FW 13.50. Root cause confirmed. #PS4 #jailbreak #infosec