Description
In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.
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 | 5.10.38-1 | — |
| Debian 13 | linux | 5.10.38-1 | — |
| Debian 12 | linux | 5.10.38-1 | — |
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 | 5.4.0-77.86 | — |
| Ubuntu 20.04 LTS | linux-aws +1 | 5.4.0-1051.53 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1013.16 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1046.49 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1046.48 | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1018.19 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1041.42 | — |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1032.33 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1048.52 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1038.41 | — |
| Ubuntu 20.04 LTS | linux-riscv +10 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-156.163 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1111.118 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 +1 | 5.4.0-1051.53~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1123.136 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1027.32 | — |
| Ubuntu 18.04 LTS | linux-gcp +12 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1108.122 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1046.49~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1046.48~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1018.19~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-77.86~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1099.101 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1080.88 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1048.52~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1038.41~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1095.101 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1112.121 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 8 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 | 5.4.0-1028.32 | — |
| 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-aws-fips | 4.15.0-2053.55 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2035.39 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1069.78 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2018.20 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1073.79 | — |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-223.256 | USN-5361-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1139.153 | USN-5361-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1111.118~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1123.136~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1108.122~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-156.163~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1104.113 | USN-5361-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1080.88~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1103.108 | USN-5361-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1123.136~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-223.256~14.04.1 | USN-5361-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-372.9.1.rt7.166.el8 | RHSA-2022:1975 |
| RHEL 8 | perf +26 | 4.18.0-372.9.1.el8 | RHSA-2022:1988 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | kernel-rt +12 | 4.18.0-305.65.1.rt7.137.el8_4 | RHSA-2022:6991 |
| RHEL 8.4 EUS | perf +26 | 4.18.0-305.65.1.el8_4 | RHSA-2022:6983 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | perf +19 | 4.18.0-372.9.1.el8 | ALSA-2022:1988 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-372.9.1.el8 | RLSA-2022:1988 |
| Rocky Linux 8 | kernel-rt | 4.18.0-372.9.1.rt7.166.el8 | RLSA-2022:1975 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-59.40.1 | SUSE-SU-2022:0198-1, SUSE-SU-2022:0131-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-38.34.1 | SUSE-SU-2022:0169-1, SUSE-SU-2022:0056-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-59.40.1.18.25.1 | SUSE-SU-2022:0198-1, SUSE-SU-2022:0131-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.105.1 | SUSE-SU-2022:0366-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.83.1 | SUSE-SU-2022:0367-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.85.1 | SUSE-SU-2022:0080-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.106.1 | SUSE-SU-2022:0068-1 |
Show 34 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.88.1 | SUSE-SU-2022:0371-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.153.1 | SUSE-SU-2022:0362-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_42 | 1-4.3.1 | SUSE-SU-2022:0362-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.164.1 | SUSE-SU-2022:0477-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-197.105.1 | SUSE-SU-2022:0366-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.83.1 | SUSE-SU-2022:0367-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.85.1 | SUSE-SU-2022:0080-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.106.1 | SUSE-SU-2022:0068-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.88.1 | SUSE-SU-2022:0371-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.153.1 | SUSE-SU-2022:0362-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_42 | 1-4.3.1 | SUSE-SU-2022:0362-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.73.1 | SUSE-SU-2022:0090-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-59.40.1 | SUSE-SU-2022:0198-1, SUSE-SU-2022:0131-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-59.40.1.18.25.1 | SUSE-SU-2022:0198-1, SUSE-SU-2022:0131-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-68.1 | SUSE-SU-2022:0079-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-68.1 | SUSE-SU-2022:0289-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-59.40.1 | SUSE-SU-2022:0198-1, SUSE-SU-2022:0131-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_11 | 1-7.3.1 | SUSE-SU-2022:0131-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_12 | 1-150300.7.3.1 | SUSE-SU-2022:0198-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_23 | 1-5.3.1 | SUSE-SU-2022:0197-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.105.1 | SUSE-SU-2022:0366-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_28 | 1-3.3.1 | SUSE-SU-2022:0366-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.83.1 | SUSE-SU-2022:0367-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_27 | 1-1.5.1 | SUSE-SU-2022:0367-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.106.1 | SUSE-SU-2022:0068-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_27 | 1-8.3.1 | SUSE-SU-2022:0068-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.88.1 | SUSE-SU-2022:0371-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_24 | 1-6.5.1 | SUSE-SU-2022:0371-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-197.105.1 | SUSE-SU-2022:0366-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.83.1 | SUSE-SU-2022:0367-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-68.1 | SUSE-SU-2022:0079-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-68.1 | SUSE-SU-2022:0289-1 |
| SUSE Package Hub 15 SP3 | connman | 1.41-bp153.2.3.1 | openSUSE-SU-2022:0056-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.88.1 | SUSE-SU-2022:0371-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.153.1 | SUSE-SU-2022:0362-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_42 | 1-4.3.1 | SUSE-SU-2022:0362-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.88.1 | SUSE-SU-2022:0371-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.153.1 | SUSE-SU-2022:0362-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_42 | 1-4.3.1 | SUSE-SU-2022:0362-1 |
| SUSE Manager Server 4.1 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SUSE Manager Server 4.1 | kernel-docs +5 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-docs +4 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SUSE Manager Proxy 4.1 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SUSE Manager Proxy 4.1 | kernel-docs +4 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.153.1 | SUSE-SU-2022:0362-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_42 | 1-4.3.1 | SUSE-SU-2022:0362-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-24.99.1.9.46.1 | SUSE-SU-2022:0197-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-24.99.1 | SUSE-SU-2022:0197-1 |
| SUSE Enterprise Storage 6 | kernel-docs +4 | 4.12.14-197.105.1 | SUSE-SU-2022:0366-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | connman | 1.41-bp153.2.3.1 | openSUSE-SU-2022:0056-1 |
| openSUSE Leap 15.3 | dtb-aarch64 +7 | 5.3.18-59.40.1 | openSUSE-SU-2022:0198-1, openSUSE-SU-2022:0131-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-38.34.1 | openSUSE-SU-2022:0169-1, openSUSE-SU-2022:0056-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-197.105.1 | openSUSE-SU-2022:0366-1, openSUSE-SU-2022:0198-1, openSUSE-SU-2022:0131-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.40.1.18.25.1 | openSUSE-SU-2022:0198-1, openSUSE-SU-2022:0131-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.2.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-372.9.1.el8 | ELSA-2022-1988 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.67.3.el7uek | ELSA-2022-9852 |
Advisories 33
- ALSA-2022:1988 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:1988 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:1975 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- USN-5361-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Sep 9, 2026
- RHSA-2022:6991 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2022:6983 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RLSA-2022:1975 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2022:1988 Important: kernel security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2022:0056-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0090-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0289-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0169-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0169-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0080-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0477-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0362-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0366-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0131-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0367-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0056-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0198-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0131-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0371-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0068-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0197-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0198-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0079-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2022:0366-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-0232 Linux Kernel: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen BSI CERT-Bund (WID) · Aug 13, 2023
- WID-SEC-2023-1969 HPE Fabric OS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Aug 6, 2023
- WID-SEC-2022-0515 IBM Spectrum Protect: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 8, 2023
- ELSA-2022-9852 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 4, 2022
- ELSA-2022-1988 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 17, 2022