What is CVE-2023-53817?

CVE-2023-53817 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 3.7 onward and patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53817 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53817?

CVE-2023-53817 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53817?

Yes, CVE-2023-53817 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53817 actively exploited?

CVE-2023-53817 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53817

High

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()

Package Linux Kernel

Published 2025-12-09

Last modified 2026-08-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 3.7 and later are affected. Fixed in 4.14.326, 4.19.295, 5.4.257, 5.10.197, 5.15.133, 6.1.55, 6.5.5, 6.6 and their respective stable series.

Affected from

≥ 3.7

Fixed in

✓ 4.14.326 4.14.x ✓ 4.19.295 4.19.x ✓ 5.4.257 5.4.x ✓ 5.10.197 5.10.x ✓ 5.15.133 5.15.x ✓ 6.1.55 6.1.x ✓ 6.5.5 6.5.x ✓ 6.6

References

8 total

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2023-53817

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2025-12-09

Modified 2026-08-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53817?

CVE-2023-53817 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 3.7 onward and has been patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53817 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53817?

CVE-2023-53817 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53817?

Yes. CVE-2023-53817 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53817 actively exploited?

No. CVE-2023-53817 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.