CVE-2023-53817

CVE-2023-53817

High · published December 9, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
42.5
In the wild
Unconfirmed
What it is

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()

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00508 · 42.5th percentile
Published
2025-12-09T06:16Z
References (8)
https://git.kernel.org/stable/c/0fc7147c694394f8a8cbc19570c6bc918cac0906 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12ac013ad7ff0df066451e825801d805095b3776 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61f5453e9706e99713825594e0c8f9031485fb5f · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/67589d247909043e94d2dd5fb590958e0f99d58d · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e47a758b70167c9301d2b44d2569f86c7796f2d · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae63e84ffda74267bf7277c38415ba38389229a0 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3ad023a39f1127dcfd331c562673355dc078650 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fde791e8a96a64ea7b0ad2440e43586447a209c6 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 09 DEC 00:01Z
    crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()
    cvelistv5