What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-30 · updated 2026-10-14
• Weakness: CWE-476

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 products

• Debian Linux: 10.0, 11.0
• Linux kernel: before 6.5 — fixed in 6.5
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions

How to fix

Upgrade to a fixed version: Linux kernel 6.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-3338
• https://bugzilla.redhat.com/show_bug.cgi?id=2218618
• https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
• https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
• https://seclists.org/oss-sec/2023/q2/276
• https://security.netapp.com/advisory/ntap-20230824-0005/
• https://www.debian.org/security/2023/dsa-5480
• https://access.redhat.com/security/cve/CVE-2023-3338
• https://bugzilla.redhat.com/show_bug.cgi?id=2218618
• https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
• https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
• https://seclists.org/oss-sec/2023/q2/276

Get alerted when CVE-2023-3338 or the next vulnerability affects your stack