CVE-2026-97573

Description

In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() bnxt_rx_ring_reset() frees the ring buffers and then reallocates them, ignoring the result. bnxt_alloc_one_rx_ring() can fail in bnxt_alloc_one_tpa_info_data(), which returns -ENOMEM on the first failed allocation and leaves the remaining rxr->rx_tpa[] entries zeroed. The error isn't propagated up, so the loop in bnxt_rx_ring_reset continues and at the end the code re-enables TPA with partially unallocated rx_tpa array. This means that when the agg_id from hardware is mapped to a SW index in rxr->rx_tpa[], an uninitialized slot can be chosen which would hand a zero DMA address to the device. Fix this by falling back to a global reset, which is what the existing code already does when other functions fail, but unlike the other failure cases this particular failure has to return because TPA can't be re-enabled since the allocation failed.

Gravité et risque d'exploitation

CVE-2026-97573 obtient un score CVSS de 8.1/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.60 %, ce qui la place devant 47.4 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <8b2fd5c0aeda935294159206af9d6179282d425a, <cfec9e7f15a56cb0104bac13d01e5d11e1ba84fb, <=6.12.*, <af9a2bdaba0b4ceb0fc5e5122ef3fc6b7e5a366a, 7.2.7, 6.18.53, 0, <40b4a7bb6b0b872b45f017dbf211268de098b75c, 5.10.271, 8fbf58e17dce8f250dda9ad6b0a49b3041f0af14, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <961e2a17c5e3559b3f8654d2daabdd25a42e770a, <5.10, <=6.18.*, 5.15.222, <1a3670b6a6b5679fe56c5890157b344f091e64f8, <=7.2.*, <=*, <=5.15.*, <52fc97cbc3ba118aad84e7c001bf02ebe8496f70, <4a17c73c83798c2fa9c7920ad5a98803adce3e01, 5.10, 6.12.111, 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/52fc97cbc3ba118aad84e7c001bf02ebe8496f70
• https://git.kernel.org/stable/c/40b4a7bb6b0b872b45f017dbf211268de098b75c
• https://git.kernel.org/stable/c/af9a2bdaba0b4ceb0fc5e5122ef3fc6b7e5a366a
• https://git.kernel.org/stable/c/cfec9e7f15a56cb0104bac13d01e5d11e1ba84fb
• https://git.kernel.org/stable/c/1a3670b6a6b5679fe56c5890157b344f091e64f8
• https://git.kernel.org/stable/c/4a17c73c83798c2fa9c7920ad5a98803adce3e01
• https://git.kernel.org/stable/c/8b2fd5c0aeda935294159206af9d6179282d425a
• https://git.kernel.org/stable/c/961e2a17c5e3559b3f8654d2daabdd25a42e770a