CVE-2026-98569

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.

Gravité et risque d'exploitation

CVE-2026-98569 obtient un score CVSS de 0.0/10, soit une gravité non évaluée.

Que faire ?

• Vérifiez si Linux (versions <4.3, <=6.1.*, <=6.12.*, <cff8b520312e750ad38967c30128e1534cbf9484, 6.18.55, 0, <2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c, 6.12.112, 5.10.271, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <bdd41b96e814300c66222cf4e47ecb8aef995656, <c80315da84998b69b8829785a174b0bf72a81992, <=6.18.*, 5.15.222, 2e15ea390e6f4466655066d97e22ec66870a042c, <=7.2.*, <da2e0cfbb620b199927a1e5b93b7cfde32083c7d, 4.3, 7.2.9, <63c5e48d6f7f5722a48f63e13e961dc5302894ed, <=*, <=5.15.*, <a3f315be9d30eeb6938d11fa17fd4b32d52f7c42, <1dc759571f3df14891175fc52527f7624ba01322, 7.3) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• 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