Description
The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
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 | 5.14.6-1 | — |
| Debian 13 | linux | 5.14.6-1 | — |
| Debian 12 | linux | 5.14.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-92.103 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1061.64 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-aws-5.11 +1 | 5.11.0-1017.18~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1065.68 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-azure-5.11 | 5.11.0-1015.16~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-azure-5.8 | 5.8.0-1043.46~20.04.1 | USN-5120-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1023.26 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-gcp +1 | 5.4.0-1059.63 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | 5.11.0-1018.20~20.04.2 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1057.60 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1029.30 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | 5.11.0-34.36~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1010.11 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1051.53 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1049.51 | USN-5106-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1048.53 | USN-5210-1 |
| Ubuntu 20.04 LTS | linux-riscv +7 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | 5.11.0-1018.19~20.04.2 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1061.64~18.04.1 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1065.68~18.04.1 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 +1 | 5.4.0-1059.63~18.04.1 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1057.60~18.04.1 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1029.30~18.04.2 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-92.103~18.04.2 | USN-5210-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1048.53~18.04.1 | USN-5210-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 10 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 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 | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1038.44 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| 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 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 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-305.7.1.rt7.79.el8_4 | RHSA-2021:2599 |
| RHEL 8 | perf +26 | 4.18.0-305.7.1.el8_4 | RHSA-2021:2570 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | kernel-rt +12 | 4.18.0-193.60.2.rt13.112.el8_2 | RHSA-2021:2719 |
| RHEL 8.2 EUS | perf +26 | 4.18.0-193.60.2.el8_2 | RHSA-2021:2718 |
| RHEL 8.1 EUS | perf +26 | 4.18.0-147.51.1.el8_1 | RHSA-2021:2666 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-305.7.1.el8_4 | ALSA-2021:2570 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-305.7.1.el8_4 | RLSA-2021:2570 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-150300.38.62.1 | SUSE-SU-2022:2172-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.76.1.150300.18.45.2 | SUSE-SU-2022:2173-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150000.150.95.1 | SUSE-SU-2022:2407-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.103.1 | SUSE-SU-2022:2377-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.127.1 | SUSE-SU-2022:2382-1 |
Show 28 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.102.1 | SUSE-SU-2022:2393-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.182.1 | SUSE-SU-2022:4611-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.196.2 | SUSE-SU-2022:4561-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150000.150.95.1 | SUSE-SU-2022:2407-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.103.1 | SUSE-SU-2022:2377-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.127.1 | SUSE-SU-2022:2382-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.102.1 | SUSE-SU-2022:2393-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.94.1 | SUSE-SU-2022:2629-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.76.1.150300.18.45.2 | SUSE-SU-2022:2173-1 |
| SLE Micro 5.2 | kernel-rt | 5.3.18-150300.93.1 | SUSE-SU-2022:2177-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.76.1.150300.18.45.2 | SUSE-SU-2022:2173-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.93.1 | SUSE-SU-2022:2177-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_20 | 1-150300.7.5.1 | SUSE-SU-2022:2173-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_27 | 1-150200.5.3.1 | SUSE-SU-2022:2104-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_31 | 1-150100.3.3.2 | SUSE-SU-2022:2111-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150000.150.95.1 | SUSE-SU-2022:2407-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_31 | 1-150000.1.3.1 | SUSE-SU-2022:2407-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.127.1 | SUSE-SU-2022:2382-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_33 | 1-8.3.1 | SUSE-SU-2022:2382-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.102.1 | SUSE-SU-2022:2393-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_28 | 1-6.3.1 | SUSE-SU-2022:2393-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150000.150.95.1 | SUSE-SU-2022:2407-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-150300.93.1 | SUSE-SU-2022:2177-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.102.1 | SUSE-SU-2022:2393-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.102.1 | SUSE-SU-2022:2393-1 |
| SUSE Manager Server 4.1 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SUSE Manager Server 4.1 | kernel-docs +5 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-docs +4 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SUSE Manager Proxy 4.1 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SUSE Manager Proxy 4.1 | kernel-docs +4 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-150200.24.115.1.150200.9.54.1 | SUSE-SU-2022:2104-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-150200.24.115.1 | SUSE-SU-2022:2104-1 |
| SUSE Enterprise Storage 6 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 +1 | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| openSUSE Leap 15.4 | kernel-debug +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| openSUSE Leap 15.3 | dtb-aarch64 +7 | 5.3.18-150300.59.76.1 | SUSE-SU-2022:2173-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-150300.38.62.1 | SUSE-SU-2022:2172-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2173-1, SUSE-SU-2022:2111-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-150300.59.76.1.150300.18.45.2 | SUSE-SU-2022:2173-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | kernel-default | 5.3.18-150300.59.76.1 | openSUSE-SU-2022:2173-1 |
| openSUSE Leap Micro 5.2 | kernel-default-base | 5.3.18-150300.59.76.1.150300.18.45.2 | openSUSE-SU-2022:2173-1 |
| openSUSE Leap Micro 5.2 | kernel-rt | 5.3.18-150300.93.1 | openSUSE-SU-2022:2177-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-305.7.1.el8_4 | ELSA-2021-2570 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.44.4.el7uek | ELSA-2020-5913, ELSA-2020-5912 |
| Oracle Linux 7 | perf +5 | 4.14.35-2025.402.2.1.el7uek | ELSA-2020-5913 |
Advisories 30
- ALSA-2021:2570 Important: kernel security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- USN-5120-1 linux-azure-5.8 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5210-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Sep 9, 2026
- RHSA-2021:2718 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:2719 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:2666 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:2599 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:2570 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- USN-5070-1 linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5106-1 linux-oem-5.10 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- RLSA-2021:2570 Important: kernel security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2022:2111-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2173-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2382-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4561-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2104-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:2177-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4611-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2377-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2393-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2172-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2629-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:2173-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2407-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2177-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-0340 Linux Kernel: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Dec 26, 2022
- ELSA-2021-2570 Important: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 1, 2021
- ELSA-2020-5913 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ELSA-2020-5912 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 6, 2020