Description
An issue was discovered in the Linux kernel before 5.8. lib/nlattr.c allows attackers to cause a denial of service (unbounded recursion) via a nested Netlink policy with a back reference.
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 | 5.8.7-1 | — |
| Debian 13 | linux | 5.8.7-1 | — |
| Debian 12 | linux | 5.8.7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-156.173 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1107.115 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1114.120 | USN-6331-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1068.74 | USN-6314-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1110.119 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1105.112 | USN-6312-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1074.78 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1054.59 | USN-6314-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1019.20 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1096.102 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1106.115 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1091.102 | USN-6284-1 |
| Ubuntu 20.04 LTS | linux-riscv +24 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1027.31 | USN-6301-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1107.115+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1113.119+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1082.91 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1110.119+fips1 | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1107.115~18.04.1 | USN-6284-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1113.119~18.04.1 | USN-6337-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1110.119~18.04.1 | USN-6284-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-156.173~18.04.1 | USN-6301-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1054.59~18.04.1 | USN-6312-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1106.115~18.04.1 | USN-6284-1 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1091.102~18.04.1 | USN-6284-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +6 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLES 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.133.1 | SUSE-SU-2023:2162-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLES 12 SP4 | drbd | 9.0.14+git.62f906cf-4.26.2 | SUSE-SU-2023:2232-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
Show 23 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP3 | kernel-docs +4 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.133.1 | SUSE-SU-2023:2162-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLE Real Time 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Real Time 15 SP3 | kernel-docs +4 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Real Time 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.121.1 | SUSE-SU-2023:1894-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.2 | kernel-rt | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_32 | 1-150300.7.3.2 | SUSE-SU-2023:2148-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_36 | 1-150200.5.3.1 | SUSE-SU-2023:2146-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_40 | 1-150100.3.3.1 | SUSE-SU-2023:2151-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_43 | 1-8.3.1 | SUSE-SU-2023:2163-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_35 | 1-6.5.1 | SUSE-SU-2023:2232-1 |
| SLE HPC 15 SP3 | kernel-64kb +5 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SUSE Manager Server 4.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Server 4.2 | kernel-source +3 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Proxy 4.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Proxy 4.2 | kernel-source +2 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb +5 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| openSUSE Leap 15.4 | kernel-debug +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
Advisories 16
- USN-6337-1 linux-azure-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6314-1 linux-bluefield, linux-ibm vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6301-1 linux-hwe-5.4, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6331-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6284-1 linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6312-1 linux-gke, linux-ibm-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- SUSE-SU-2023:2151-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2162-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1894-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2146-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2148-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2163-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2147-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2232-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0752 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 6, 2025