CVE-2026-98569None▾ SunlitIn 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, ch…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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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.
Linux >= 2e15ea390e6f4466655066d97e22ec66870a042c < c80315da84998b69b8829785a174b0bf72a81992Linux >= 2e15ea390e6f4466655066d97e22ec66870a042c < cff8b520312e750ad38967c30128e1534cbf9484Linux >= 2e15ea390e6f4466655066d97e22ec66870a042c < 1dc759571f3df14891175fc52527f7624ba01322Linux >= 2e15ea390e6f4466655066d97e22ec66870a042c < da2e0cfbb620b199927a1e5b93b7cfde32083c7dLinux >= 2e15ea390e6f4466655066d97e22ec66870a042c < 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5cLinux >= 2e15ea390e6f4466655066d97e22ec66870a042c < bdd41b96e814300c66222cf4e47ecb8aef995656Linux >= 2e15ea390e6f4466655066d97e22ec66870a042c < 63c5e48d6f7f5722a48f63e13e961dc5302894edLinux >= 2e15ea390e6f4466655066d97e22ec66870a042c < a3f315be9d30eeb6938d11fa17fd4b32d52f7c42Linux 4.3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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