ip_gre: Reject enabling collect metadata through changelink
In the Linux kernel, the following vulnerability has been resolved: ip_gre: Reject enabling collect metadata through changelink ipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP or ERSPAN device. Unlike newlink, changelink does not enforce metadata tunnel uniqueness. Converting a non-metadata device can therefore replace the metadata receive entry for another device of the same type in the same netns. Deleting either device then clears the shared entry, breaking metadata receive lookup for the surviving device. If parameter validation fails after collect_md is set, deleting the modified device can also clear an entry it never owned. Reject enabling metadata mode in both changelink callbacks before any encapsulation or tunnel parameters are modified. Allow requests that repeat the metadata attribute on an existing metadata device.
CVE-2026-98569
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-2026-98569
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": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "c80315da84998b69b8829785a174b0bf72a81992",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "cff8b520312e750ad38967c30128e1534cbf9484",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "1dc759571f3df14891175fc52527f7624ba01322",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "da2e0cfbb620b199927a1e5b93b7cfde32083c7d",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "bdd41b96e814300c66222cf4e47ecb8aef995656",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "63c5e48d6f7f5722a48f63e13e961dc5302894ed",
"versionType": "git"
},
{
"status": "affected",
"version": "2e15ea390e6f4466655066d97e22ec66870a042c",
"lessThan": "a3f315be9d30eeb6938d11fa17fd4b32d52f7c42",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/ip_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": "4.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/ip_gre.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98569
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38588 · Revision 1
- Added to Heist Feed
- Publisher date