CVE-2026-64465
Full vulnerability record from the local CVENow database.
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Awaiting Analysis
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-25 10:17:31.763000
Last modified
2026-11-03 18:15:39.353000
View original CVE JSON
{
"id": "CVE-2026-64465",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-25T10:17:31.763",
"lastModified": "2026-11-03T18:15:39.353",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix sleep in atomic context in xhci_free_streams()\n\nWhen a USB device with active stream endpoints is disconnected,\nxhci_free_streams() is called from the hub_event workqueue to\nfree the stream resources. It calls xhci_free_stream_info()\nwhile holding xhci->lock with irqs disabled.\n\nxhci_free_stream_info() invokes xhci_free_stream_ctx(), which\ncalls dma_free_coherent() for large stream context arrays.\n\ndma_free_coherent() can sleep (e.g. via vunmap), triggering\na BUG when called from atomic context.\n\nCall trace:\n dma_free_attrs+0x174/0x220\n xhci_free_stream_info+0xd0/0x11c\n xhci_free_streams+0x278/0x37c\n usb_free_streams+0x98/0xc0\n usb_unbind_interface+0x1b8/0x2f8\n device_release_driver_internal+0x1d4/0x2cc\n device_release_driver+0x18/0x28\n bus_remove_device+0x160/0x1a4\n device_del+0x1ec/0x350\n usb_disable_device+0x98/0x214\n usb_disconnect+0xf0/0x35c\n hub_event+0xab4/0x19ec\n process_one_work+0x278/0x63c\n\nFix this by saving the stream_info pointers and clearing the\nep references under the lock, then calling xhci_free_stream_info()\noutside the lock where sleeping is allowed."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/usb/host/xhci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
"lessThan": "e623e4a203f56d5c57519a9a3cb29600551534ad",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "d107eb316144c5fb958486e7fe604cd7f1b35cda",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "1e45aa722c4ce5663e987102aac18c8ad6a83fdd",
"versionType": "git",
"status": "affected"
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{
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"status": "affected"
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"status": "affected"
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{
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{
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"versionType": "git",
"status": "affected"
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{
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"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/usb/host/xhci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "2.6.35",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.35",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.261",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.212",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.178",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.145",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.96",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.39",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.4",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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{
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{
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{
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{
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{
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}