CVE-2023-6121: Kernel: nvme: info leak due to out-of-bounds read in nvmet_ctrl_find_get

Modified

AliasesUBUNTU-CVE-2023-6121DEBIAN-CVE-2023-6121

Published 16-11-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-6121 is a medium (CVSS 4.3) Out-of-bounds Read vulnerability in redhat enterprise_linux. EPSS estimates a 1.64% chance of exploitation in the next 30 days, higher than 76.4% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

4.3/10

010

Medium · v3.1 (CVE.org)

EPSS score

1.64%

0%100%

Low · -0.01 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

16-11-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability 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

5 scores · 4 sources · 2 versions

v4.08.8v3.14.3

EPSS trend

Probability

1.64%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 1.66% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu115 products

linux< 4.15.0-223.235 | < 5.4.0-173.191 | < 5.15.0-100.110
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.15.0-1166.179 | < 5.4.0-1120.130 | < 5.15.0-1056.61
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1056.61~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1120.130~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5< 6.5.0-1015.15~22.04.1
linux-aws-fips< 4.15.0-2105.111 | All versions (No fix recorded) | < 5.4.0-1120.130+fips1 | < 5.15.0-1056.61+fips1
linux-aws-hwe< 4.15.0-1166.179~16.04.1
linux-azure< 4.15.0-1175.190~14.04.1 | < 4.15.0-1175.190~16.04.1 | All versions (No fix recorded) | < 5.4.0-1126.133 | < 5.15.0-1058.66
linux-azure-4.15< 4.15.0-1175.190
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1058.66~20.04.2
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1126.133~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5< 6.5.0-1016.16~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1058.66.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2084.90 | All versions (No fix recorded) | < 5.4.0-1126.133+fips1
linux-bluefield< 5.4.0-1080.87 | < 5.15.0-1037.39
linux-fips< 4.15.0-1121.132 | All versions (No fix recorded) | < 5.4.0-1094.104 | < 5.15.0-100.110+fips1
linux-gcp< 4.15.0-1160.177~16.04.1 | All versions (No fix recorded) | < 5.4.0-1124.133 | < 5.15.0-1053.61
linux-gcp-4.15< 4.15.0-1160.177
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1053.61~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1124.133~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5< 6.5.0-1015.15~22.04.1
linux-gcp-fips< 4.15.0-2068.73 | All versions (No fix recorded) | < 5.4.0-1124.133+fips1 | < 5.15.0-1055.63+fips2
linux-gkeAll versions (No fix recorded) | < 5.15.0-1052.57
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1087.91 | < 5.15.0-1038.44
linux-gkeop-5.15< 5.15.0-1038.44~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-223.235~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-100.110~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-173.191~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5< 6.5.0-25.25~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1067.72 | < 5.15.0-1048.51
linux-ibm-5.15< 5.15.0-1048.51~20.04.1
linux-ibm-5.4< 5.4.0-1067.72~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1048.50
linux-intel-iotg< 5.15.0-1050.56
linux-intel-iotg-5.15< 5.15.0-1050.56~20.04.1
linux-iot< 5.4.0-1032.33
linux-kvm< 4.15.0-1150.155 | < 5.4.0-1108.115 | < 5.15.0-1052.57
linux-lowlatency< 5.15.0-100.110
linux-lowlatency-hwe-5.15< 5.15.0-100.110~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5< 6.5.0-25.25.1~22.04.1
linux-nvidia< 5.15.0-1046.46
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-6.5< 6.5.0-1014.14
linux-nvidia-tegra< 5.15.0-1025.25
linux-nvidia-tegra-5.15< 5.15.0-1025.25~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1012.12
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1033.33
linux-oem-6.5< 6.5.0-1016.17
linux-oracle< 4.15.0-1129.140~16.04.1 | < 4.15.0-1129.140 | < 5.4.0-1119.128 | < 5.15.0-1053.59
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1053.59~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1119.128~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.5All versions (No fix recorded)
linux-raspi< 5.4.0-1104.116 | < 5.15.0-1048.51 | < 6.7.0-1001.1
linux-raspi-5.4< 5.4.0-1104.116~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1056.63
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1051.55~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.5< 6.5.0-25.25.1~22.04.1
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5< 6.5.0-1009.10~22.04.1
linux-xilinx-zynqmp< 5.4.0-1039.43 | < 5.15.0-1030.34

Show all 115

Debian1 product

linux< 6.1.64-1 | < 6.6.8-1

Redhat1 product

enterprise_linuxEOL6.0 | 7.0 | 8.0 | 9.0

3 vendors · 117 products

References

34 links

access.redhat.com/errata/RHSA-2024:2394Vendor AdvisoryX Refsource REDHAT
access.redhat.com/errata/RHSA-2024:2950Vendor AdvisoryX Refsource REDHAT
access.redhat.com/errata/RHSA-2024:3138Vendor AdvisoryX Refsource REDHAT
access.redhat.com/security/cve/CVE-2023-6121VDB EntryX Refsource REDHATREPORTThird Party Advisory
bugzilla.redhat.com/show_bug.cgi?id=2250043Issue TrackingX Refsource REDHATThird Party Advisory
lists.debian.org/debian-lts-announce/2024/01/msg00005.htmlX Transferred
cert-portal.siemens.com/productcert/html/ssa-398330.html
cert-portal.siemens.com/productcert/html/ssa-265688.html
cert-portal.siemens.com/productcert/html/ssa-613116.html
ubuntu.com/security/CVE-2023-6121REPORT

Show all 34 references

lore.kernel.org/linux-nvme/b58a2dc6-cc8f-4d19-9efe-e1d5b4505efc@nvidia.com/T/REPORT
lore.kernel.org/linux-nvme/CAK5usQvxAyC3LJ4OnqerS1P0JpbfFr9uRZmq6Jb4QhaB7AQCoQ@mail.gmail.com/T/REPORT
ubuntu.com/security/notices/USN-6639-1Advisory
ubuntu.com/security/notices/USN-6680-1Advisory
ubuntu.com/security/notices/USN-6681-1Advisory
ubuntu.com/security/notices/USN-6686-1Advisory
ubuntu.com/security/notices/USN-6680-2Advisory
ubuntu.com/security/notices/USN-6681-2Advisory
ubuntu.com/security/notices/USN-6681-3Advisory
ubuntu.com/security/notices/USN-6686-2Advisory
ubuntu.com/security/notices/USN-6701-1Advisory
ubuntu.com/security/notices/USN-6680-3Advisory
ubuntu.com/security/notices/USN-6681-4Advisory
ubuntu.com/security/notices/USN-6686-3Advisory
ubuntu.com/security/notices/USN-6686-4Advisory
ubuntu.com/security/notices/USN-6705-1Advisory
ubuntu.com/security/notices/USN-6701-2Advisory
ubuntu.com/security/notices/USN-6701-3Advisory
ubuntu.com/security/notices/USN-6716-1Advisory
ubuntu.com/security/notices/USN-6686-5Advisory
ubuntu.com/security/notices/USN-6701-4Advisory
www.cve.org/CVERecord?id=CVE-2023-6121REPORT
security-tracker.debian.org/tracker/CVE-2023-6121Advisory
nvd.nist.gov/vuln/detail/CVE-2023-6121OvalAdvisory