CVE-2026-64465

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