CVE-2026-64465
usb: xhci: Fix sleep in atomic context in xhci_free_streams()
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64465
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Save stream info pointers before clearing.
- Clear endpoint references under lock.
- Call xhci_free_stream_info() outside lock.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64465.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64465 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64465
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64465 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64465 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': 'e623e4a203f56d5c57519a9a3cb29600551534ad', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': 'd107eb316144c5fb958486e7fe604cd7f1b35cda', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': '1e45aa722c4ce5663e987102aac18c8ad6a83fdd', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': '10666ac9c552990204e791af653abf8e9d9ff619', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': 'f7b022ae07685e7526fc39f387ce65b5d309dd3b', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': 'f90586129cf9e1fbdb718ef602eea3f15dc1c31c', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': '93cd037da94fcb93183bfb2457e3a56d3eb4c8f4', 'versionType': 'git'}, {'status': 'affected', 'version': '8df75f42f8e67e2851cdcf6da91640fb881defd1', 'lessThan': '42c37c4b75d38b51d84f31a8e29427f5e06a7c2a', 'versionType': 'git'}], 'programFiles': ['drivers/usb/host/xhci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.35'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.35', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/host/xhci.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619 Added Reference https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd Added Reference https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a Added Reference https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4 Added Reference https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda Added Reference https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad Added Reference https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b Added Reference https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c