Medium 6.5Published Jun 29, 2023

CVE-2023-3338Crash due to a null pointer dereference in the dn_nsp_send function

Updated under an hour ago (Oct 26, 2026, 12:50 PM ET)

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It affects Red Hat Enterprise Linux 6 and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 6

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux	6	CNA record
Fedora Fedora fedora:fedora (from the name)	All versions	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1	CISA ADP
linux linux_kernel linux:linux_kernel	before 6.5	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
debian debian_linux debian:debian_linux	10.0; 11.0	NVD

References

References

https://access.redhat.com/security/cve/CVE-2023-3338	vdb-entry, x-refsource-redhat, third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218618	issue-tracking, x-refsource-redhat
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html	mailing-list, third-party-advisory
https://seclists.org/oss-sec/2023/q2/276	exploit, mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20230824-0005/	third-party-advisory
https://www.debian.org/security/2023/dsa-5480	third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.