At least the ones I'm familiar with boil down to "there is a logic bug in the encryption layer where some settings get munged" or "there is a memory correctness

At least the ones I'm familiar with boil down to "there is a logic bug in the encryption layer where some settings get munged" or "there is a memory correctness bug in some edge cases with the weird double-existence that was plumbed in for having encrypted and unencrypted buffers violating expectations in places".