Description
In the Linux kernel, the following vulnerability has been resolved:
rtnetlink: add missing netlink_ns_capable() check for peer netns
rtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer
network namespace when creating paired devices (veth, vxcan,
netkit). This allows an unprivileged user with a user namespace
to create interfaces in arbitrary network namespaces, including
init_net.
Add a netlink_ns_capable() check for CAP_NET_ADMIN in the peer
namespace before allowing device creation to proceed.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 2.6.33 | 6.18.24 |
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 | 6.19.14-1 | — |
| Debian 13 | linux | No fix yet | — |
| Debian 12 | linux | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 24.04 LTS | linux-bluefield | No fix yet | — |
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | No fix yet | — |
| Ubuntu 26.04 LTS | linux-nvidia | 7.0.0-1006.6 | — |
| Ubuntu 25.10 | linux +8 | No fix yet | — |
| Ubuntu 24.04 LTS | linux +44 | No fix yet | — |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | linux +59 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime +3 | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime +2 | No fix yet | — |
| 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 24.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips +3 | No fix yet | — |
| 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 +3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux +21 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux +12 | 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 10 | rv +76 | 6.12.0-211.39.1.el10_2 | RHSA-2026:45114 |
| RHEL 9 | rv +75 | 5.14.0-687.47.1.el9_8 | RHSA-2026:67150 |
| RHEL 8 | kernel-rt +12 | 4.18.0-553.150.1.rt7.491.el8_10 | RHSA-2026:49213 |
| RHEL 8 | perf +26 | 4.18.0-553.150.1.el8_10 | RHSA-2026:49214 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.8 TUS | perf +17 | 4.18.0-477.168.1.el8_8 | RHSA-2026:69837 |
| RHEL 8.8 E4S | perf +18 | 4.18.0-477.168.1.el8_8 | RHSA-2026:69837 |
| RHEL 8.4 EUS Long Life | perf +17 | 4.18.0-305.216.1.el8_4 | RHSA-2026:91585 |
| RHEL 8.4 AUS | perf +17 | 4.18.0-305.216.1.el8_4 | RHSA-2026:91585 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | rv +74 | 6.12.0-211.39.1.el10_2 | ALSA-2026:45114 |
| AlmaLinux 9 | rv +73 | 5.14.0-687.47.1.el9_8 | ALSA-2026:67150 |
| AlmaLinux 8 | kernel-rt +9 | 4.18.0-553.150.1.rt7.491.el8_10 | ALSA-2026:49213 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.150.1.el8_10 | ALSA-2026:49214 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | kernel | 6.12.0-211.39.1.el10_2 | RLSA-2026:45114 |
| Rocky Linux 9 | kernel | 5.14.0-687.47.1.el9_8 | RLSA-2026:67150 |
| Rocky Linux 8 | kernel | 4.18.0-553.150.1.el8_10 | RLSA-2026:49214 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.150.1.rt7.491.el8_10 | RLSA-2026:49213 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.18.25-55.108 +2 | 1:1.0-0.amzn2023 | ALAS2023-2026-1894, ALAS2023-2026-1882, ALAS2023-2026-1693 |
| Amazon Linux 2023 | perf +11 | 1:6.1.175-219.357.amzn2023 | ALAS2023-2026-1882 |
| Amazon Linux 2023 | perf6.12 +11 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 |
| Amazon Linux 2023 | perf6.18 +11 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 |
| Amazon Linux 2 | kernel-livepatch-4.14.355-284.735 | 1.0-0.amzn2 | ALAS2-2026-3380 |
| Amazon Linux 2 | perf +8 | 4.14.355-284.735.amzn2 | ALAS2-2026-3380 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | rv +29 | 6.12.0-211.39.1.el10_2 | ELSA-2026-45114 |
| Oracle Linux 8 | perf +19 | 4.18.0-553.150.1.el8_10 | ELSA-2026-49214 |
Advisories 22
- RHSA-2026:91585 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:49213 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:49214 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:67150 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALSA-2026:45114 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:67150 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:49213 Important: kernel-rt security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:49214 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-1326 Linux Kernel: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 27, 2026
- RHSA-2026:45114 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:69837 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2026-3043 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- RLSA-2026:67150 Important: kernel security, bug fix, and enhancement update Rocky Linux Security Advisories · Sep 15, 2026
- ALAS2023-2026-1894 Important: kernel6.12 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 6, 2026
- RLSA-2026:49213 Important: kernel-rt security update Rocky Linux Security Advisories · Aug 4, 2026
- RLSA-2026:49214 Important: kernel security update Rocky Linux Security Advisories · Aug 4, 2026
- ELSA-2026-49214 Important: kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 3, 2026
- ALAS2023-2026-1882 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 1, 2026
- ELSA-2026-45114 Important: kernel security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 29, 2026
- RLSA-2026:45114 Important: kernel security update Rocky Linux Security Advisories · Jul 27, 2026
- ALAS2-2026-3380 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1693 Important: kernel6.18 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 19, 2026