geneve: require CAP_NET_ADMIN in the device netns for changelink
In the Linux kernel, the following vulnerability has been resolved: geneve: require CAP_NET_ADMIN in the device netns for changelink A tunnel changelink() operates on at most two netns, dev_net(dev) and the sticky underlay netns geneve->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 geneve->net can rewrite a geneve device whose underlay lives in geneve->net. geneve_changelink() applies the new configuration against geneve->net: geneve_link_config() and the geneve_quiesce()/geneve_unquiesce() pair reopen the underlay sockets in that netns (geneve_sock_add() uses geneve->net), so the same reasoning as the tunnel changelink series applies here. Gate geneve_changelink() with rtnl_dev_link_net_capable(), at the top of the op before any attribute is parsed, matching ipgre_changelink() and the rest of the "require CAP_NET_ADMIN in the device netns for changelink" series. Found by 0sec automated security-research tooling (https://0sec.ai).
CVE-2026-68142
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-2026-68142
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": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "a5522963c57f12df5f9db804ebfc472b58eef0ae",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "278c6a31ee27c931c722202c8c06cc3253923254",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "11a7d989d00160481a273eb4f7f05f64b5a6ffdf",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "2abdacc927c92fa6a9cc8341e8c9b88dcb561553",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "9de5518fc1fab583526a8f66b8e505c4864dc60a",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "f8c498585d2a08aa623748353c3e61467b7e9fd2",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "95f45e20f1b2cec13823f0f68060ab4b2261b2c1",
"versionType": "git"
},
{
"status": "affected",
"version": "5b861f6baa3a22a48d7a4ad0ce38a223d36c978a",
"lessThan": "8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/geneve.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"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": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/geneve.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68142
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41133 · Revision 1
- Added to Heist Feed
- Publisher date