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CVE-2023-3338

Crash due to a null pointer dereference in the dn_nsp_send function

MEDIUM
6.5
CVSS Score
Published: June 30, 2023 at 12:00 AM UTC
Updated: October 14, 2026 at 09:17 PM UTC
5 products affected across 5 vendorsLinux KernelDebian LinuxActive IQ Unified Manager

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Severity
MEDIUM6.5
Exploit prediction
EPSS 8%
SSVC
PoC

Description

A 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.0
Linux Kernel· Linux
95%
v < 6.5
Affected range stops below 6.5, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6.5-rc1 (unaffected)
Active IQ Unified Manager· NetAppnpm
95%
All versions
Fedora· Fedora Projectrpm
90%
All versions
Enterprise Linux· Red Hatrpm
90%
All versions
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7 (unaffected)
Vendor states this is fixed in 8 (unaffected)
Vendor states this is fixed in 9 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

VDB Entryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2023-3338
Issue Trackingx_refsource_REDHAT
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2218618
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
ExploitMailing ListThird Party Advisory
Source: [email protected]
https://seclists.org/oss-sec/2023/q2/276
Third Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20230824-0005/
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5480
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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