Crash due to a null pointer dereference in the dn_nsp_send function

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Summary

CVECVE-2023-3338
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-30 22:15:10 UTC
Updated2026-10-14 21:17:16 UTC
DescriptionA null pointer dereference flaw was found in the Linux kernel's DECnet networking protocol. This issue could allow a remote user to crash the system.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.082890000 probability, percentile 0.948440000 (date 2026-10-14)

Problem Types: CWE-476 | CWE-476 NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Linux Linux Kernel All All All All
Application Netapp Active Iq Unified Manager - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel unaffected 6.5-rc1 Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Fedora Fedora Not specified Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified

References

ReferenceSourceLinkTags
2218618 – (CVE-2023-3338) CVE-2023-3338 kernel: DECnet: crash due to a NULL pointer dereference in the dn_nsp_send function af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking
oss-sec: CVE-2023-3338: Linux Kernel NULL Pointer Dereference in DECnet af854a3a-2127-422b-91ae-364da2661108 seclists.org Exploit, Mailing List, Third Party Advisory
[SECURITY] [DLA 3623-1] linux-5.10 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-5480-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
CVE-2023-3338 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] [DLA 3508-1] linux security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Davide Ornaghi (Betrusted Srl) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-06-20T00:00:00.000ZReported to Red Hat.
CNA2023-06-26T00:00:00.000ZMade public.

Legacy QID Mappings

  • 199804 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6417-1)
  • 199809 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6416-1)
  • 199814 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6416-2)
  • 199840 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-6416-3)
  • 199844 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6445-1)
  • 199858 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6445-2)
  • 6000136 Debian Security Update for linux (DLA 3508-1)
  • 6000212 Debian Security Update for linux (DSA 5480-1)
  • 6000265 Debian Security Update for linux-5.10 (DLA 3623-1)
  • 673449 EulerOS Security Update for kernel (EulerOS-SA-2023-2898)
  • 673970 EulerOS Security Update for kernel (EulerOS-SA-2023-2879)
  • 907605 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (31687-1)

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