CVE-2026-68425
Vulnérabilité élevée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: IB/mad: Drop unmatched RMPP responses before reassembly Kernel-handled RMPP receive processing starts reassembly for active DATA responses before the response is matched to an outstanding send. The normal match happens later, after ib_process_rmpp_recv_wc() has either assembled a complete message or consumed the segment. That ordering lets an unsolicited response that routes to a kernel RMPP agent by the high TID bits allocate or extend RMPP receive state before the full TID and source address are checked against a real request. A reordered burst can therefore reach the receive-side insertion path even though the response would not match any send. For kernel-handled RMPP DATA responses, require the existing ib_find_send_mad() match before entering RMPP reassembly. The matcher already checks the full TID, management class and source address/GID against the agent wait, backlog and in-flight send lists. If there is no match, drop the response without creating RMPP state. This leaves the RMPP window behavior unchanged and only rejects responses that have no corresponding request.
Gravité et risque d'exploitation
CVE-2026-68425 obtient un score CVSS de 7.1/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.26 %, ce qui la place devant 16.6 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, <2.6.13, <=6.12.*, <6e1bd7f590b0ccfee07f7fe1d48b92059bd37d72, 6.12.101, 0, <=7.1.*, 5.15.216, 2.6.13, <=5.10.*, <=6.6.*, 6.18.42, 7.1.6, 6.1.183, <bfb9e8243fd2099d1080d09222964d988f991d9b, <=6.18.*, <45416c87ebcece1e90f3bc5bc172d106b77c6b69, <9634fb1f4d404f36a20ffbcb8797369db69b06bb, <=*, <=5.15.*, <ad9c9ad3204f63a46f0f7de29687a8e512f05e29, fa619a77046bef30478697aba0553991033afb8e, <dfa535c94406c03d3f0c869ef3ba5528e395737c, 5.10.265, 6.6.148, 7.2, <98d2d468b4faa1fdc68c0c6c238389906ee3490c, <d2e52d610b9b09694261632340b801a421e0b0c5) 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/45416c87ebcece1e90f3bc5bc172d106b77c6b69
- https://git.kernel.org/stable/c/9634fb1f4d404f36a20ffbcb8797369db69b06bb
- https://git.kernel.org/stable/c/bfb9e8243fd2099d1080d09222964d988f991d9b
- https://git.kernel.org/stable/c/dfa535c94406c03d3f0c869ef3ba5528e395737c
- https://git.kernel.org/stable/c/6e1bd7f590b0ccfee07f7fe1d48b92059bd37d72
- https://git.kernel.org/stable/c/98d2d468b4faa1fdc68c0c6c238389906ee3490c
- https://git.kernel.org/stable/c/ad9c9ad3204f63a46f0f7de29687a8e512f05e29
- https://git.kernel.org/stable/c/d2e52d610b9b09694261632340b801a421e0b0c5