What is CVE-2023-53817?

CVE-2023-53817 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-12-09.

How severe is CVE-2023-53817?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Linux

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 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()

EPSS: 0.003 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, 3.7, 0

References

Frequently asked questions

What is CVE-2023-53817?: CVE-2023-53817 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-12-09.
How severe is CVE-2023-53817?: High severity. CVSS v3 base score is 7.5 out of 10.