CVE-2026-98569ip_gre: Reject enabling collect metadata through changelink
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2e15ea390e6f4466655066d97e22ec66870a042c before c80315da84998b69b8829785a174b0bf72a81992; from 2e15ea390e6f4466655066d97e22ec66870a042c before cff8b520312e750ad38967c30128e1534cbf9484; 2e15ea390e6f4466655066d97e22ec66870a042c builds before 1dc759571f3df14891175fc52527f7624ba01322; from 2e15ea390e6f4466655066d97e22ec66870a042c before da2e0cfbb620b199927a1e5b93b7cfde32083c7d; from 2e15ea390e6f4466655066d97e22ec66870a042c before 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c; from 2e15ea390e6f4466655066d97e22ec66870a042c before bdd41b96e814300c66222cf4e47ecb8aef995656; from 2e15ea390e6f4466655066d97e22ec66870a042c before 63c5e48d6f7f5722a48f63e13e961dc5302894ed; from 2e15ea390e6f4466655066d97e22ec66870a042c before a3f315be9d30eeb6938d11fa17fd4b32d52f7c42 | CNA record |
References
- https://git.kernel.org/stable/c/c80315da84998b69b8829785a174b0bf72a81992
- https://git.kernel.org/stable/c/cff8b520312e750ad38967c30128e1534cbf9484
- https://git.kernel.org/stable/c/1dc759571f3df14891175fc52527f7624ba01322
- https://git.kernel.org/stable/c/da2e0cfbb620b199927a1e5b93b7cfde32083c7d
- https://git.kernel.org/stable/c/2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c
- https://git.kernel.org/stable/c/bdd41b96e814300c66222cf4e47ecb8aef995656
- https://git.kernel.org/stable/c/63c5e48d6f7f5722a48f63e13e961dc5302894ed
- https://git.kernel.org/stable/c/a3f315be9d30eeb6938d11fa17fd4b32d52f7c42
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.