Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink
ip6gre_changelink() and ip6erspan_changelink() operate on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net.
Gate both ops on rtnl_dev_link_net_capable() at their top, before any attribute is parsed.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Debian 10 ELS , Debian 11 ELS , Oracle Linux 7 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.19.0 (+10 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | In Rollout |
139 kernels
|
| Amazon Linux 2023 | Planned | — |
| CentOS 8 | In Rollout |
33 kernels
|
| CloudLinux OS 7h | In Rollout |
120 kernels
|
| CloudLinux OS 8 | In Rollout |
115 kernels
|
| Debian 12 | Released |
42 kernels
|
| Oracle Linux 8 | In Rollout |
154 kernels
|
| Oracle Linux 8 UEK 7 | Released |
112 kernels
|
| Oracle Linux 9 UEK 7 | Released |
112 kernels
|
| RHEL 8 | In Rollout |
155 kernels
|
| RHEL 9 | Planned | — |
| Rocky Linux 8 | In Rollout |
115 kernels
|
| Ubuntu 22.04 | Planned | — |
| Ubuntu 22.04 AWS | Planned | — |
| Ubuntu 22.04 Azure | Planned | — |
| Ubuntu 24.04 | Planned | — |
| Ubuntu 24.04 AWS | Planned | — |
| Ubuntu 26.04 | In Rollout |
2 kernels
|