CVE-2023-53817
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.