CVE-2026-72052 (GCVE-0-2026-72052)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-10-19 21:19
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: 690afc165bb314354667f67157c1a1aea7dc797a
Version: d0201d2405dac8d9b16773e97709925e397552d0
Version: 7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a
Version: 4.19.100   ≤
Version: 5.4.16   ≤
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    "datePublished": "2026-08-15T05:52:09.194Z",
    "dateReserved": "2026-08-09T03:40:39.902Z",
    "dateUpdated": "2026-10-19T21:19:24.924Z",
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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-\u003enet can\\nrewrite a tunnel that lives in t-\u003enet.\\n\\nGate both ops on rtnl_dev_link_net_capable() at their top, before any\\nattribute is parsed.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.261\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.212\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.178\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.145\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.97\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.40\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1.5\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.2\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.100\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-17T05:39:48.851Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-72052\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T21:19:24.924Z\", \"dateReserved\": \"2026-08-09T03:40:39.902Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-08-15T05:52:09.194Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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