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net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-72055

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-72055

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "f5254e7766b4ac02b66b2ccef896cd278503cb11",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "ef897249dc957089e6f7f11ceea699e093ad51bd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "c64b9ae7eb97e81d54b792910a3aeafd92566c79",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "0b2f9c908f930ec4be17d389723f9a202d6a883c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "f97e93ebf2f9b8ef3b87f7a9371255e84d151587",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "e2ac3b242c37dff323a964962e43854f4b1a2b79",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ipv6/ip6_vti.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv6/ip6_vti.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72055

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41852 · Revision 1
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Publisher date
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