{"id":"CVE-2026-72052","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72052","summary":"net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink\n\nip6gre_changelink() and ip6erspan_changelink() operate on at most two\nnetns, dev_net(dev) and the tunnel link netns t->net. They differ once\nthe device is created in or moved to a netns other than the one the\nrequest runs in. The rtnl changelink path checks CAP_NET_ADMIN only\nagainst dev_net(dev), so a caller privileged there but not in t->net can\nrewrite a tunnel that lives in t->net.\n\nGate both ops on rtnl_dev_link_net_capable() at their top, before any\nattribute is parsed.","published":"2026-08-15T05:52:09.194Z","modified":"2026-08-18T03:56:19.540609599Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.261"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03d8843b143ebbbfaf48511922abc6e886575a61"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0caa9f348f8b5356900de77b0bb89a697c4aff20"},{"type":"WEB","url":"https://git.kernel.org/stable/c/129f8939e5af683cec3a1a5edcb40a64636ad81e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1d4d8ee002083ca4ead5353662bf8362428af57f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/220162c9fedbe992da70d70f50a10da4f45f914c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c38c8b0db3c65b597e7ece317b6cb59de3d15e69"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e3724dedf57761c6de52f4d604ec74f66fd61611"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f00a50876d2818bd6dc86fa98b3ef360884c53c8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72052.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72052"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:19.540609599Z"}}