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CVE-2023-3338

20
FAUCET Score

CVE-2023-3338 is a null pointer dereference vulnerability in the Linux kernel's DECnet networking protocol, affecting various Debian and NetApp products utilizing the Linux kernel. This medium-severity flaw (CVSS 6.5) allows a remote, low-privileged attacker to crash the system, leading to a denial of service. While the vulnerability has a relatively low EPSS score and no known active exploitation, public exploit code, or significant community discussion, its potential to disrupt system availability warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vsphere:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
All Versions ImpactedCPE match
cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*

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
8.03%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0803 is in the 98th percentile among its peer group of 21,977 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia msrc
Product: azl3 hyperv-daemons 6.6.92.2-1 on Azure Linux 3.0Fixed in: 6.6.35.1-1
microsoftpatch availablevia msrc
Product: azl3 hyperv-daemons 6.6.35.1-1 on Azure Linux 3.0Fixed in: 6.6.35.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.137.1-1 on CBL Mariner 2.0Fixed in: 5.15.137.1-1
microsoftpatch availablevia msrc
Product: cbl2 hyperv-daemons 5.15.158.1-1 on CBL Mariner 2.0Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: azl3 systemd-bootstrap 250.3-17 on Azure Linux 3.0

Vendor Advisories (2)

redhatCVE-2023-3338Moderate

kernel: DECnet: crash due to a NULL pointer dereference in the dn_nsp_send function

Jun 26, 2023
microsoft2023-Jun/CVE-2023-3338Moderate

Crash due to a null pointer dereference in the dn_nsp_send function

Jun 13, 2023

References

access.redhat.com / security/cve/CVE-2023-3338
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
lists.debian.org / debian-lts-announce/2023/07/msg00030.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2023/10/msg00027.html
Mailing ListThird Party Advisory
seclists.org / oss-sec/2023/q2/276
ExploitMailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20230824-0005
Third Party Advisory
debian.org / security/2023/dsa-5480
Third Party Advisory