CVE-2026-64222

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: avoid double free of pool->stack on AQ init failure otx2_pool_aq_init() frees pool->stack when mailbox sync or retry allocation fails, but leaves the pointer unchanged. Later, otx2_sq_aura_pool_init() unwinds the partial setup through otx2_aura_pool_free(), which frees pool->stack again. The CN20K-specific cn20k_pool_aq_init() implementation has the same bug in its corresponding error path. Set pool->stack to NULL immediately after the local free so the shared cleanup path does not free the same stack again while cleaning up partially initialized pool state. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3. Runtime validation was not performed because reproducing this path requires OcteonTX2/CN20K hardware.

Gravité et risque d'exploitation

CVE-2026-64222 obtient un score CVSS de 7.0/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.12 %, ce qui la place devant 1.8 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <b92e7ea408b6f1144648909c9c49a55d245d7300, <9b244c242bec48b37e82b89787afd6a4c43457e1, <=6.1.*, <=7.0.*, <=6.12.*, 6.12.93, 0, 6.18.35, <4c29603498b05c049dbbbc47e882f2fbf0193cd7, 6.1.176, 5.15.210, 5.6, <0d9b9d7dbef976ae7f855b6358f1d703014e96ea, <=5.10.*, <=6.6.*, <94192b0579333c3deee2441379aab8ca98fc2e6b, <e6e9bc0bf963662b7042048ab0281014625d4cb4, 7.1, <=6.18.*, 7.0.11, <c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec, caa2da34fd25a37e9fd43343b6966fb9d730a6d5, <0488a0bb344fb1992853b60082acff6be8164d74, <5.6, <=*, <=5.15.*, 6.6.143, 5.10.259) 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/e6e9bc0bf963662b7042048ab0281014625d4cb4
• https://git.kernel.org/stable/c/b92e7ea408b6f1144648909c9c49a55d245d7300
• https://git.kernel.org/stable/c/94192b0579333c3deee2441379aab8ca98fc2e6b
• https://git.kernel.org/stable/c/4c29603498b05c049dbbbc47e882f2fbf0193cd7
• https://git.kernel.org/stable/c/0488a0bb344fb1992853b60082acff6be8164d74
• https://git.kernel.org/stable/c/0d9b9d7dbef976ae7f855b6358f1d703014e96ea
• https://git.kernel.org/stable/c/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec
• https://git.kernel.org/stable/c/9b244c242bec48b37e82b89787afd6a4c43457e1