CVE-2026-72055
Full vulnerability record from the local CVENow database.
Description
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.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-15 06:21:14.890000
Last modified
2026-10-19 22:17:24.623000
View original CVE JSON
{
"id": "CVE-2026-72055",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-15T06:21:14.890",
"lastModified": "2026-10-19T22:17:24.623",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink\n\nvti6_changelink() operates on at most two netns, dev_net(dev) and the\ntunnel link netns t->net. They differ once the device is created in or\nmoved to a netns other than the one the request runs in. The rtnl\nchangelink path checks CAP_NET_ADMIN only against dev_net(dev), so a\ncaller privileged there but not in t->net can rewrite a tunnel that\nlives in t->net.\n\nGate vti6_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"net/ipv6/ip6_vti.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"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",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"net/ipv6/ip6_vti.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "3.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.15",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.261",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.212",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.178",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.145",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.97",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:51:02.327568Z",
"id": "CVE-2026-72055",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-862"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/0b2f9c908f930ec4be17d389723f9a202d6a883c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c64b9ae7eb97e81d54b792910a3aeafd92566c79",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e2ac3b242c37dff323a964962e43854f4b1a2b79",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ef897249dc957089e6f7f11ceea699e093ad51bd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f5254e7766b4ac02b66b2ccef896cd278503cb11",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f97e93ebf2f9b8ef3b87f7a9371255e84d151587",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}