CVE-2023-6121

Medium

An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg).

Package Linux Kernel
Published 2023-11-16
Last modified 2026-05-12
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

4.3

out of 10
Medium
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness type

CWE-125

CVE-2023-6121 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

9 total
Showing 5 of 9 references View all on NVD

Frequently asked questions

  • What is CVE-2023-6121?

    CVE-2023-6121 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.3 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . CVE-2023-6121 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-6121?

    CVE-2023-6121 has a CVSS score of 4.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N .

  • Is there a patch available for CVE-2023-6121?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-6121 patch availability.

  • Is CVE-2023-6121 actively exploited?

    No. CVE-2023-6121 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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