CVE-2023-53817

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()<br /> <br /> During NVMeTCP Authentication a controller can trigger a kernel<br /> oops by specifying the 8192 bit Diffie Hellman group and passing<br /> a correctly sized, but zeroed Diffie Hellamn value.<br /> mpi_cmp_ui() was detecting this if the second parameter was 0,<br /> but 1 is passed from dh_is_pubkey_valid(). This causes the null<br /> pointer u-&gt;d to be dereferenced towards the end of mpi_cmp_ui()