01 Record

CVE-2023-3338

Crash due to a null pointer dereference in the dn_nsp_send function

MediumPUBLISHEDCNA: redhat

CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

Crash due to a null pointer dereference in the dn_nsp_send function

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

8.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 94.9% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-06-30 00:00Z3 YR AGO

Last updated

2026-10-14 20:51Z14 DAYS AGO

Reserved

2023-06-20

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

898c94d683743231f32f6a72b90868e25ec90bc113f5d871f69043035dd0475f

05 Affected products

VendorProductVersionsPlatforms

n/akernelNot specified—

Red HatRed Hat Enterprise Linux 6Not specified—

Red HatRed Hat Enterprise Linux 7Not specified—

Red HatRed Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 9Not specified—

FedoraFedoraNot specified—

06 References

access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-3338vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2218618https://bugzilla.redhat.com/show_bug.cgi?id=2218618issue-trackingx_refsource_REDHAT
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
seclists.orghttps://seclists.org/oss-sec/2023/q2/276
security.netapp.comhttps://security.netapp.com/advisory/ntap-20230824-0005/
www.debian.orghttps://www.debian.org/security/2023/dsa-5480
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-794697.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.1.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.1.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.