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NVD / CVE Program· CNA redhat

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

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 76.3% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: CBL Mariner 2.0 ARM 5.15.143.1-1; CBL Mariner 2.0 x64 5.15.143.1-1.

Low priority for now. Upgrade to CBL Mariner 2.0 ARM 5.15.143.1-1; CBL Mariner 2.0 x64 5.15.143.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

MediumCVSS 4.3 · v3.1—No exploit Fix available
Published
Nov 16, 2023
Updated
Oct 14, 2026
EPSS
1.6% · 76th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
4.3
CNA · redhat
4.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • 0:4.18.0-553.rt7.342.el8_10 and laternot affected · rpm
    • 0:4.18.0-553.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 0:5.14.0-427.13.1.el9_4 and laternot affected · rpm
    • 0:5.14.0-427.13.1.el9_4 and laternot affected · rpm
    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10linux-5.10before 5.10.205-2~deb10u15.10.205-2~deb10u1
Debian:11linuxbefore 5.10.205-25.10.205-2
Debian:12linuxbefore 6.1.64-16.1.64-1
Debian:13linuxbefore 6.6.8-16.6.8-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-64kbbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-azurebefore 5.14.21-150500.33.29.15.14.21-150500.33.29.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-defaultbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-default-basebefore 5.14.21-150500.55.44.1.150500.6.19.25.14.21-150500.55.44.1.150500.6.19.2
openSUSE:Leap 15.5kernel-docsbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-obs-buildbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-rtbefore 5.14.21-150500.13.30.15.14.21-150500.13.30.1
openSUSE:Leap 15.5kernel-rt_debugbefore 5.14.21-150500.13.30.15.14.21-150500.13.30.1
openSUSE:Leap 15.5kernel-sourcebefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-source-azurebefore 5.14.21-150500.33.29.15.14.21-150500.33.29.1
openSUSE:Leap 15.5kernel-source-rtbefore 5.14.21-150500.13.30.15.14.21-150500.13.30.1
openSUSE:Leap 15.5kernel-symsbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap 15.5kernel-syms-azurebefore 5.14.21-150500.33.29.15.14.21-150500.33.29.1
openSUSE:Leap 15.5kernel-syms-rtbefore 5.14.21-150500.13.30.15.14.21-150500.13.30.1
openSUSE:Leap 15.5kernel-zfcpdumpbefore 5.14.21-150500.55.44.15.14.21-150500.55.44.1
openSUSE:Leap Micro 5.3kernel-defaultbefore 5.14.21-150400.24.103.15.14.21-150400.24.103.1

+72

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-3246libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, wKEV
    62This week
  • CVE-2023-50387Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of ser
    60This week
  • CVE-2017-5456A mechanism to bypass file system access protections in the sandbox using the file system request constructor through an IPC message.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-1665Jun 21, 2022 · A set of pre-production kernel packages of Red Hat Enterprise Linux for IBM Power architecture can be booted by the grub in Secure Boot mode
    32Monitor
  • ← EarlierCVE-2023-1380Mar 27, 2023 · A slab-out-of-bound read problem was found in brcmf_get_assoc_ies in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linu
    33Monitor
  • Later →CVE-2023-50781Feb 5, 2024 · M2crypto: bleichenbacher timing attacks in the rsa decryption api - incomplete fix for cve-2020-25657
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
CBL Mariner 2.0 ARM5.15.143.1-1 · hyperv-daemonsMicrosoft (MSRC)
CBL Mariner 2.0 x645.15.143.1-1 · hyperv-daemonsMicrosoft (MSRC)
debian:linux6.1.64-1 · Debian:12Package registry (OSV)
debian:linux-5.105.10.205-2~deb10u1 · Debian:10Package registry (OSV)
opensuse:dtb-aarch645.14.21-150500.55.44.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-64kb5.14.21-150500.55.44.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.29.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-debug5.14.21-150500.55.44.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default5.14.21-150400.24.103.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-default-base5.14.21-150400.24.103.1.150400.24.48.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-rt5.14.21-150500.13.30.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-rt_debug5.14.21-150500.13.30.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.29.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-rt5.14.21-150500.13.30.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.29.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-rt5.14.21-150500.13.30.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:kernel-azure4.12.14-16.163.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-azure5.14.21-150500.33.29.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-default4.12.14-122.189.1 · SUSE:Linux Enterprise High Availability Extension 12 SP5Package registry (OSV)
suse:kernel-docs4.12.14-122.189.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:kernel-livepatch-SLE15-SP4-RT_Update_171-150400.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-livepatch-SLE15-SP5-RT_Update_91-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-obs-build4.12.14-122.189.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:kernel-rt5.14.21-150500.13.30.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-rt5.3.18-150300.155.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-rt_debug5.14.21-150500.13.30.1 · SUSE:Real Time Module 15 SP5Package registry (OSV)
suse:kernel-source-azure4.12.14-16.163.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-source-azure5.14.21-150500.33.29.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-source-rt5.14.21-150500.13.30.1 · SUSE:Real Time Module 15 SP5Package registry (OSV)
suse:kernel-syms-azure4.12.14-16.163.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)

+2

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-1380234 days apartA slab-out-of-bound read problem was found in brcmf_get_assoc_ies in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linu
    33Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records