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CVE-2023-6536

23
FAUCET Score

CVE-2023-6536 is a NULL pointer dereference vulnerability in the Linux kernel's NVMe driver, specifically impacting NVMe over TCP implementations in distributions like Debian and Red Hat. An unauthenticated attacker can trigger a kernel panic and denial of service by sending crafted TCP packages. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0, < 5.4.268CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.5, < 5.10.209CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.15.148CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.75CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.6.14CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0154 is in the 54th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-513.18.1.rt7.320.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-513.18.1.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kernel-0:4.18.0-372.91.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: kernel-0:4.18.0-477.58.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-362.24.1.el9_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-0:5.14.0-284.52.1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-rt-0:5.14.0-284.52.1.rt14.337.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-372.91.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/cluster-logging-operator-bundle:v5.8.6-22
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/cluster-logging-rhel9-operator:v5.8.6-11
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/elasticsearch6-rhel9:v6.8.1-407
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/elasticsearch-operator-bundle:v5.8.6-19
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/elasticsearch-proxy-rhel9:v1.0.0-479
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/elasticsearch-rhel9-operator:v5.8.6-7
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/eventrouter-rhel9:v0.4.0-247
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/fluentd-rhel9:v5.8.6-5
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/log-file-metric-exporter-rhel9:v1.1.0-227
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/logging-curator5-rhel9:v5.8.1-470
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/logging-loki-rhel9:v2.9.6-14
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/logging-view-plugin-rhel9:v5.8.6-2
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/loki-operator-bundle:v5.8.6-24
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/loki-rhel9-operator:v5.8.6-10
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/lokistack-gateway-rhel9:v0.1.0-525
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/opa-openshift-rhel9:v0.1.0-224
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.8-RHEL-9Fixed in: openshift-logging/vector-rhel9:v0.28.1-56
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2023-6536Moderate

kernel: NULL pointer dereference in __nvmet_req_complete

Dec 11, 2023

References

lists.debian.org / debian-lts-announce/2024/06/msg00016.html
lists.fedoraproject.org / archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP
security.netapp.com / advisory/ntap-20240415-0001
access.redhat.com / errata/RHSA-2024:0723
Third Party Advisory
access.redhat.com / errata/RHSA-2024:0724
Third Party Advisory
access.redhat.com / errata/RHSA-2024:0725
Third Party Advisory
access.redhat.com / errata/RHSA-2024:0881
Third Party Advisory
access.redhat.com / errata/RHSA-2024:0897
Third Party Advisory
access.redhat.com / errata/RHSA-2024:1248
Third Party Advisory
access.redhat.com / errata/RHSA-2024:2094
Third Party Advisory
access.redhat.com / errata/RHSA-2024:3810
Third Party Advisory
access.redhat.com / security/cve/CVE-2023-6536
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking