In the Linux kernel, the following vulnerability has been resolved:
net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink
ip6_tnl_changelink() operates 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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-toolsUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-develUpgrade kernel-livepatch-6.12.103-127.188Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade bpftool6.12Upgrade kernel6.12-modules-extraUpgrade perf6.12Upgrade kernel6.12-headersUpgrade kernel6.12-debuginfo-common-aarch64Upgrade bpftool6.12-debuginfoUpgrade kernel6.12Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-debuginfo | Sep 1, 2026 | Aug 15, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 16, 2026 | Aug 16, 2026 |
| Redhat_linux | — | No solution exists | Aug 19, 2026 | Aug 15, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 25, 2026 | Aug 15, 2026 |
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