CVE-2026-64465

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Source
https://cve.org/CVERecord?id=CVE-2026-64465
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64465.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-64465
Downstream
Related
Published
2026-07-25T08:51:31Z
Modified
2026-08-31T18:26:57Z
Summary
usb: xhci: Fix sleep in atomic context in xhci_free_streams()
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->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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64465.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8df75f42f8e67e2851cdcf6da91640fb881defd1
Fixed
e623e4a203f56d5c57519a9a3cb29600551534ad
Fixed
d107eb316144c5fb958486e7fe604cd7f1b35cda
Fixed
1e45aa722c4ce5663e987102aac18c8ad6a83fdd
Fixed
10666ac9c552990204e791af653abf8e9d9ff619
Fixed
f7b022ae07685e7526fc39f387ce65b5d309dd3b
Fixed
f90586129cf9e1fbdb718ef602eea3f15dc1c31c
Fixed
93cd037da94fcb93183bfb2457e3a56d3eb4c8f4
Fixed
42c37c4b75d38b51d84f31a8e29427f5e06a7c2a

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64465.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.35
Fixed
5.10.261
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.212
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.178
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.145
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.96
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.39
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64465.json"