{"id":"DEBIAN-CVE-2026-64465","details":"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-\u003elock 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.","modified":"2026-09-14T16:47:35.513935858Z","published":"2026-07-25T10:17:31.763Z","upstream":["CVE-2026-64465"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-64465"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.180-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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