CVE-2026-64465

Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix sleep in atomic context in xhci_free_streams() When a USB device with active stream endpoints is disconnected, xhci_free_streams() is called from the hub_event workqueue to free the stream resources. It calls xhci_free_stream_info() while holding xhci->lock with irqs disabled. xhci_free_stream_info() invokes xhci_free_stream_ctx(), which calls dma_free_coherent() for large stream context arrays. dma_free_coherent() can sleep (e.g. via vunmap), triggering a BUG when called from atomic context. Call trace: dma_free_attrs+0x174/0x220 xhci_free_stream_info+0xd0/0x11c xhci_free_streams+0x278/0x37c usb_free_streams+0x98/0xc0 usb_unbind_interface+0x1b8/0x2f8 device_release_driver_internal+0x1d4/0x2cc device_release_driver+0x18/0x28 bus_remove_device+0x160/0x1a4 device_del+0x1ec/0x350 usb_disable_device+0x98/0x214 usb_disconnect+0xf0/0x35c hub_event+0xab4/0x19ec process_one_work+0x278/0x63c Fix this by saving the stream_info pointers and clearing the ep references under the lock, then calling xhci_free_stream_info() outside the lock where sleeping is allowed.

Gravité et risque d'exploitation

CVE-2026-64465 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.18 %, ce qui la place devant 7.6 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <f90586129cf9e1fbdb718ef602eea3f15dc1c31c, 6.18.39, <10666ac9c552990204e791af653abf8e9d9ff619, 0, <e623e4a203f56d5c57519a9a3cb29600551534ad, <=7.1.*, 7.1.4, 6.1.178, <=5.10.*, <=6.6.*, 8df75f42f8e67e2851cdcf6da91640fb881defd1, <93cd037da94fcb93183bfb2457e3a56d3eb4c8f4, <=6.18.*, 5.15.212, <2.6.35, 5.10.261, 6.6.145, <1e45aa722c4ce5663e987102aac18c8ad6a83fdd, <d107eb316144c5fb958486e7fe604cd7f1b35cda, <=*, <=5.15.*, <f7b022ae07685e7526fc39f387ce65b5d309dd3b, 6.12.96, 7.2, 2.6.35, <42c37c4b75d38b51d84f31a8e29427f5e06a7c2a) 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/e623e4a203f56d5c57519a9a3cb29600551534ad
• https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda
• https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd
• https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619
• https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b
• https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c
• https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4
• https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a