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net: ip6_gre: 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_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.

Announced Source revision 1
Original source ↗

CVE-2026-72052

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-2026-72052

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": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "129f8939e5af683cec3a1a5edcb40a64636ad81e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "e3724dedf57761c6de52f4d604ec74f66fd61611",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "220162c9fedbe992da70d70f50a10da4f45f914c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "1d4d8ee002083ca4ead5353662bf8362428af57f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "0caa9f348f8b5356900de77b0bb89a697c4aff20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "03d8843b143ebbbfaf48511922abc6e886575a61",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "c38c8b0db3c65b597e7ece317b6cb59de3d15e69",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "690afc165bb314354667f67157c1a1aea7dc797a",
        "lessThan": "f00a50876d2818bd6dc86fa98b3ef360884c53c8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d0201d2405dac8d9b16773e97709925e397552d0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4.19.100",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.4.16",
        "lessThan": "5.5",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/ipv6/ip6_gre.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.5",
        "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_gre.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72052

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41849 · Revision 1
Added to Heist Feed
Publisher date
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