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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64465 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619 kernel.org
https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd kernel.org
https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a kernel.org
https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4 kernel.org
https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda kernel.org
https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad kernel.org
https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b kernel.org
https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64465
NVD Published Date:
07/25/2026
NVD Last Modified:
07/25/2026
Source:
kernel.org