CVE-2026-31692
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedApr 30, 2026
First seenApr 30, 2026
How to fix
Update
- linux linux_kernel6.18.24, 6.19.14 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.33 ≤ v < 6.18.24, 6.19 ≤ v < 6.19.14, 7.0 | 6.18.24, 6.19.14 |
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