CVE-2026-68354

Description

In the Linux kernel, the following vulnerability has been resolved: firewire: net: Fix fragmented datagram reassembly fwnet_frag_new() keeps a sorted list of received fragments for a partial datagram. When a new fragment is adjacent to an existing fragment, the code checks whether the new fragment also closes the gap to the next or previous list entry. Those neighbor lookups currently assume that the current fragment always has a real next or previous fragment. At a list edge, the next or previous entry is the list head, not a struct fwnet_fragment_info. The gap checks also compare against the old edge of the current fragment instead of the edge after adding the new fragment. As a result, a fragment that bridges two existing ranges may leave two adjacent ranges unmerged, so fwnet_pd_is_complete() can miss a complete datagram. Check for the list head before looking up the neighboring fragment, and compare the neighbor against the new fragment's far edge when deciding whether to merge all three ranges. This issue was found by a static analysis checker and confirmed by manual source review.

Gravité et risque d'exploitation

CVE-2026-68354 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.28 %, ce qui la place devant 19.4 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 6.12.101, <0177e578d7a885037b0fb82286c12e9d0360cc10, 0, <1aaf16031d65ccd4576451a79f7dabbec994c111, <2a5aa4e9b89227d1a1690fb8d5b81e5f3b261999, <0a219b2a01b4fe93706717e3bcacf7f62967b26f, <=7.1.*, c76acec6d55107b652a37c90b36c00bc8b04dabb, 5.15.216, <22e05b8ddbcf7d22c7f1598786e86635547e554d, <=5.10.*, <=6.6.*, <2.6.31, 6.18.42, 7.1.6, 6.1.183, <b7d633c7c92321be98724b1d365e8ce507f2f349, <=6.18.*, 2.6.31, <=*, <=5.15.*, <d52a13adbb8ccbab99cd3bad36804e87d8b5c052, <268cea3800eda5fa3ee04a49ee2973b8766a8df3, 5.10.265, 6.6.148, 7.2) 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/1aaf16031d65ccd4576451a79f7dabbec994c111
• https://git.kernel.org/stable/c/0a219b2a01b4fe93706717e3bcacf7f62967b26f
• https://git.kernel.org/stable/c/268cea3800eda5fa3ee04a49ee2973b8766a8df3
• https://git.kernel.org/stable/c/b7d633c7c92321be98724b1d365e8ce507f2f349
• https://git.kernel.org/stable/c/22e05b8ddbcf7d22c7f1598786e86635547e554d
• https://git.kernel.org/stable/c/0177e578d7a885037b0fb82286c12e9d0360cc10
• https://git.kernel.org/stable/c/2a5aa4e9b89227d1a1690fb8d5b81e5f3b261999
• https://git.kernel.org/stable/c/d52a13adbb8ccbab99cd3bad36804e87d8b5c052