CVE-2026-98569 | BDVDB-2026-390899 Detail
LinuxLinux
Description#
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.
Impact#
No impact statement in the source data.
Weaknesses#
No weakness recorded in the source data.
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
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.