CVE-2023-53817high

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.5%

exploitation probability

0.5%top 59% of all CVEs

observed exploitation

nono source reports it

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/0fc7147c694394f8a8cbc19570c6bc918cac0906 https://git.kernel.org/stable/c/12ac013ad7ff0df066451e825801d805095b3776 https://git.kernel.org/stable/c/61f5453e9706e99713825594e0c8f9031485fb5f https://git.kernel.org/stable/c/67589d247909043e94d2dd5fb590958e0f99d58d https://git.kernel.org/stable/c/9e47a758b70167c9301d2b44d2569f86c7796f2d https://git.kernel.org/stable/c/ae63e84ffda74267bf7277c38415ba38389229a0 https://git.kernel.org/stable/c/d3ad023a39f1127dcfd331c562673355dc078650 https://git.kernel.org/stable/c/fde791e8a96a64ea7b0ad2440e43586447a209c6