net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink
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.
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