CVE-2023-3338

MEDIUMNVD 6.57.5▲Elevated

6.5

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 v3: 6.5
EG Score: 7.5(medium)
EPSS: 92.1%
KEV: Not listed

Published

June 30, 2023

Last Modified

November 21, 2024

References (14)

secalert@redhathttps://access.redhat.com/security/cve/CVE-2023-3338
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2218618
secalert@redhathttps://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
secalert@redhathttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
secalert@redhathttps://seclists.org/oss-sec/2023/q2/276
secalert@redhathttps://security.netapp.com/advisory/ntap-20230824-0005/
secalert@redhathttps://www.debian.org/security/2023/dsa-5480
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-3338
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2218618
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/oss-sec/2023/q2/276
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230824-0005/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5480

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-virtual-hwe-20.04-edge (5.15.0.86.83) @ jammy	2026-05-23	ubuntu
ubuntu	linux-xilinx-zynqmp-tools-5.4.0-1031 (5.4.0-1031.35) @ focal	2026-05-23	ubuntu
ubuntu	linux-tools-raspi-nolpae (5.15.0.1040.38) @ jammy	2026-05-23	ubuntu
ubuntu	linux-virtual-hwe-20.04-edge (5.15.0.86.96~20.04.44) @ focal	2026-05-23	ubuntu
ubuntu	linux-tools-intel-iotg-edge (5.15.0.1043.49~20.04.33) @ focal	2026-05-23	ubuntu
ubuntu	linux-tools-intel-iotg (5.15.0.1043.43) @ jammy	2026-05-23	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCTurtleARM/CVE-2023-3338-DECPwn
First seen Jun 29, 2023
Linux kernel LPE practice with an NPD vulnerability
Open source ↗

Frequently asked(5)

What is CVE-2023-3338?

CVE-2023-3338 is a medium vulnerability published on June 30, 2023. 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.

When was CVE-2023-3338 disclosed?

CVE-2023-3338 was first published in the National Vulnerability Database on June 30, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-3338 actively exploited?

CVE-2023-3338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-3338?

CVE-2023-3338 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.

How do I remediate CVE-2023-3338?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3338, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-3338

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CVE-2023-3338

Published

Last Modified

References (14)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-3338?

Same vendor

Same CWE

CVE-2023-3338

📅 Published

🔄 Last Modified

🔗 References (14)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-3338?

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References (14)

Frequently asked(5)

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