net: sit: require CAP_NET_ADMIN in the device netns for changelink
In the Linux kernel, the following vulnerability has been resolved: net: sit: require CAP_NET_ADMIN in the device netns for changelink ipip6_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 ipip6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed. sit was the one tunnel type not covered by the recent series that added this check to the other changelink() handlers.
CVE-2026-72061
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-2026-72061
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": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "cb41b308e9d867725d965b291dd085028e36a480",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "c5a0ae895432596b2f464172da8218e2d84e2932",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "7d139dec96691cde96cb40ed293e2d13d994fb4f",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "388ccffbd2e7e5e4271f291085a7451865705305",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "c0ea1aedb37bb979e864ed7787975434bbd9db73",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "3118e97dae533fb45964b87bbed1801afcff7c65",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "99ae3248b33df94201915d9c32e7470cdf08cfcd",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6700b3bf98fe98d630bf9c939ad4c85ce95592",
"lessThan": "27ccb68e7cccead5d8c611665a45d23032d468b3",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/sit.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.11",
"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/sit.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72061
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41854 · Revision 1
- Added to Heist Feed
- Publisher date