CVE-2023-6121

Aliases:UBUNTU-CVE-2023-6121DEBIAN-CVE-2023-6121
Advisory lineage Upstream: 0 Downstream: 38
Modified
Published: 16 Nov 2023, 14:45
Last modified:12 May 2026, 10:32

Vulnerability Summary

Overall Risk (default)
low
18/100
CVSS Score
4.3 MEDIUM
v3.1 (cve.org)
EPSS Score
1.66% LOW
2% probability +1.41%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Nov 2023, 14:45
Published
Vulnerability first disclosed
12 May 2026, 10:32
Last Modified
Vulnerability information updated

Description

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).

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Trends

Current EPSS score: 1.66%• Percentile: 76%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•linux

    < 5.10.205-2 | < 6.1.64-1 | < 6.6.8-1 | < 6.6.8-1

  • ubuntu•linux

    < 4.15.0-223.235 | < 5.4.0-173.191 | < 5.15.0-100.110

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    < 4.15.0-1166.179 | < 5.4.0-1120.130 | < 5.15.0-1056.61

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    < 5.15.0-1056.61~20.04.1

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1120.130~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-6.5

    < 6.5.0-1015.15~22.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2105.111 | all | < 5.4.0-1120.130+fips1 | < 5.15.0-1056.61+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1166.179~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1175.190~14.04.1 | < 4.15.0-1175.190~16.04.1 | all | < 5.4.0-1126.133 | < 5.15.0-1058.66

  • ubuntu•linux-azure-4.15

    < 4.15.0-1175.190

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    < 5.15.0-1058.66~20.04.2

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1126.133~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-6.5

    < 6.5.0-1016.16~22.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all | < 5.15.0-1058.66.1 | all

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fde-6.8

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2084.90 | all | < 5.4.0-1126.133+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1080.87 | < 5.15.0-1037.39

  • ubuntu•linux-fips

    < 4.15.0-1121.132 | all | < 5.4.0-1094.104 | < 5.15.0-100.110+fips1

  • ubuntu•linux-gcp

    < 4.15.0-1160.177~16.04.1 | all | < 5.4.0-1124.133 | < 5.15.0-1053.61

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1160.177

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.15

    < 5.15.0-1053.61~20.04.1

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1124.133~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.2

    all

  • ubuntu•linux-gcp-6.5

    < 6.5.0-1015.15~22.04.1

  • ubuntu•linux-gcp-fips

    < 4.15.0-2068.73 | all | < 5.4.0-1124.133+fips1 | < 5.15.0-1055.63+fips2

  • ubuntu•linux-gke

    all | < 5.15.0-1052.57

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.15

    all

Showing first 50 affected entries in server-rendered view.

References (33)