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CVE-2023-53817

HIGHCVSS 7.5/10EPSS 0.26%

Last modified

CVE-2023-53817 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 estimates a 0.26% chance of exploitation in the next 30 days.

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()

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.26%

17.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < fde791e8a96a64ea7b0ad2440e43586447a209c6; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < ae63e84ffda74267bf7277c38415ba38389229a0; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < 61f5453e9706e99713825594e0c8f9031485fb5f; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < 0fc7147c694394f8a8cbc19570c6bc918cac0906; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < 67589d247909043e94d2dd5fb590958e0f99d58d; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < d3ad023a39f1127dcfd331c562673355dc078650; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < 12ac013ad7ff0df066451e825801d805095b3776; >= 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5, < 9e47a758b70167c9301d2b44d2569f86c7796f2d
LinuxLinux3.7

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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()
How severe is CVE-2023-53817?
CVE-2023-53817 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.
How do I fix CVE-2023-53817?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST