CVE-2026-72052
Description
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.
How to fix
- Linux Linux129f8939e5af683cec3a1a5edcb40a64636ad81e, e3724dedf57761c6de52f4d604ec74f66fd61611, 220162c9fedbe992da70d70f50a10da4f45f914c, 1d4d8ee002083ca4ead5353662bf8362428af57f, 0caa9f348f8b5356900de77b0bb89a697c4aff20, 03d8843b143ebbbfaf48511922abc6e886575a61, c38c8b0db3c65b597e7ece317b6cb59de3d15e69, f00a50876d2818bd6dc86fa98b3ef360884c53c8, 4.20, 5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < 129f8939e5af683cec3a1a5edcb40a64636ad81e, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < e3724dedf57761c6de52f4d604ec74f66fd61611, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < 220162c9fedbe992da70d70f50a10da4f45f914c, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < 1d4d8ee002083ca4ead5353662bf8362428af57f, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < 0caa9f348f8b5356900de77b0bb89a697c4aff20, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < 03d8843b143ebbbfaf48511922abc6e886575a61, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < c38c8b0db3c65b597e7ece317b6cb59de3d15e69, 690afc165bb314354667f67157c1a1aea7dc797a ≤ v < f00a50876d2818bd6dc86fa98b3ef360884c53c8, d0201d2405dac8d9b16773e97709925e397552d0, 7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a, 4.19.100 ≤ v < 4.20, 5.4.16 ≤ v < 5.5, 5.5 | 129f8939e5af683cec3a1a5edcb40a64636ad81e, e3724dedf57761c6de52f4d604ec74f66fd61611, 220162c9fedbe992da70d70f50a10da4f45f914c, 1d4d8ee002083ca4ead5353662bf8362428af57f, 0caa9f348f8b5356900de77b0bb89a697c4aff20, 03d8843b143ebbbfaf48511922abc6e886575a61, c38c8b0db3c65b597e7ece317b6cb59de3d15e69, f00a50876d2818bd6dc86fa98b3ef360884c53c8, 4.20, 5.5 |
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