CVE-2026-72055
Description
In the Linux kernel, the following vulnerability has been resolved: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_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 vti6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
How to fix
- Linux Linuxf5254e7766b4ac02b66b2ccef896cd278503cb11, ef897249dc957089e6f7f11ceea699e093ad51bd, f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba, c64b9ae7eb97e81d54b792910a3aeafd92566c79, b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf, 0b2f9c908f930ec4be17d389723f9a202d6a883c, f97e93ebf2f9b8ef3b87f7a9371255e84d151587, e2ac3b242c37dff323a964962e43854f4b1a2b79 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < f5254e7766b4ac02b66b2ccef896cd278503cb11, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < ef897249dc957089e6f7f11ceea699e093ad51bd, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < c64b9ae7eb97e81d54b792910a3aeafd92566c79, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < 0b2f9c908f930ec4be17d389723f9a202d6a883c, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < f97e93ebf2f9b8ef3b87f7a9371255e84d151587, 61220ab349485d911083d0b7990ccd3db6c63297 ≤ v < e2ac3b242c37dff323a964962e43854f4b1a2b79, 3.15 | f5254e7766b4ac02b66b2ccef896cd278503cb11, ef897249dc957089e6f7f11ceea699e093ad51bd, f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba, c64b9ae7eb97e81d54b792910a3aeafd92566c79, b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf, 0b2f9c908f930ec4be17d389723f9a202d6a883c, f97e93ebf2f9b8ef3b87f7a9371255e84d151587, e2ac3b242c37dff323a964962e43854f4b1a2b79 |
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