net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink
In the Linux kernel, the following vulnerability has been resolved: net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink ip6_tnl_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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
CVE-2026-72051
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-2026-72051
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": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "2d53ee7daabe733deb81f51d2cc90188f8ad59a1",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "82e53e7281c71e174f9f5877c566a623c637b406",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "5252db8fb604321133138c7069d6fc3fcd89cdee",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "2636d061bc237a2446a146e42dcc6563acfa7432",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "7f68f7928484f463a5bc0d50e6fdd8d16f55a5aa",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "234cd54fc500f69db43e37de38603da617fbbeea",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "d4bcc202a3530c856e1cb183384bc9cc8fddab22",
"versionType": "git"
},
{
"status": "affected",
"version": "0bd8762824e73a3cce7b7560a97463301764b616",
"lessThan": "2496fa0b7d180b3ad356b514e7ff93bb14e6140a",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/ip6_tunnel.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"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_tunnel.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72051
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41848 · Revision 1
- Added to Heist Feed
- Publisher date