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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | kernel | — | 6.5-rc1 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Fedora | Fedora | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.1.4-1 | — |
| Debian 13 | linux | 6.1.4-1 | — |
| Debian 12 | linux | 6.1.4-1 | — |
| Debian 11 | linux | 5.10.191-1 | DSA-5480-1 |
| Debian 10 | linux | 4.19.289-1 | DLA-3508-1 |
| Debian 10 | linux-5.10 | 5.10.197-1~deb10u1 | DLA-3623-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1027.29 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-86.96 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1047.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1049.56 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1049.56.1 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1044.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1030.35 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1040.43 | USN-6416-3, USN-6416-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1043.49 | USN-6445-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-86.95 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1037.37 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1018.18 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1005.5 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1045.51 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-riscv +12 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-164.181 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1111.120 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1047.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1117.124 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1049.56~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1049.56~20.04.1.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1072.78 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1115.124 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1044.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1078.82 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1030.35~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-86.96~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1058.63 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1040.43~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1043.49~20.04.1 | USN-6445-2 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1023.24 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1100.106 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-86.95~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1018.18~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1110.119 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1045.51~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1095.106 | USN-6417-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1043.47~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1031.35 | USN-6417-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1040.42 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1048.54 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1111.120+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1117.124+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1086.95 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1115.124+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1114.123~20.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux +5 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1111.120~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1117.124~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1115.124~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-164.181~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1058.63~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1110.119~18.04.1 | USN-6417-1 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1095.106~18.04.1 | USN-6417-1 |
| Ubuntu Pro 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | hyperv-daemons | 6.6.35.1-1 | — |
| Azure Linux 3 | pcp | No fix yet | — |
| Azure Linux 2 (CBL-Mariner) | hyperv-daemons | 5.15.158.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.137.1-1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
TurtleARM/CVE-2023-3338-DECPwn ★ 35 · Jun 29, 2023
Linux kernel LPE practice with an NPD vulnerability
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 12
- USN-6416-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-2 linux-hwe-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-2 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-3 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6417-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- SSA-794697 SSA-794697: Vulnerabilities in the Additional GNU/Linux Subsystem of the SIMATIC S7-1500 TM MFP Before V1.1 Siemens ProductCERT · Oct 13, 2026
- DSA-5480-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3508-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3623-1 linux-5.10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ICSA-23-166-11 Siemens SIMATIC S7-1500 TM MFP Linux Kernel CISA ICS & IT advisories · Apr 9, 2024
- WID-SEC-2023-1564 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 24, 2023
References
- https://access.redhat.com/security/cve/CVE-2023-3338 vdb-entry
- RHBZ#2218618 issue-tracking
- 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