Overview
About vulnerability
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.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 7 ELS , Debian 10 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- kernel @ 5.10.0 (+15 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 10 | Released |
54 kernels
|
| AlmaLinux 8 | In Rollout |
121 kernels
|
| AlmaLinux 9.2 ESU | Planned | — |
| AlmaLinux 9.6 ESU | Planned | — |
| Amazon Linux 2 | Released |
124 kernels
|
| Amazon Linux 2023 | Released |
57 kernels
|
| CentOS 8 | In Rollout |
33 kernels
|
| CloudLinux OS 7h | In Rollout |
114 kernels
|
| Oracle Linux 10 | Released |
39 kernels
|
| Oracle Linux 8 | In Rollout |
140 kernels
|
| RHEL 10 | Released |
53 kernels
|
| RHEL 8 | In Rollout |
137 kernels
|
| Rocky Linux 10 | Released |
36 kernels
|
| Rocky Linux 8 | In Rollout |
99 kernels
|