CVE-2026-64454
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: run gadget disconnect from sleepable suspend context dwc3_gadget_suspend() takes dwc->lock with IRQs disabled and then calls dwc3_disconnect_gadget(). For async callbacks that helper only uses plain spin_unlock()/spin_lock(), so the gadget ->disconnect() callback still runs with IRQs disabled and any sleepable callback trips Lockdep. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the dwc3_gadget_suspend() -> dwc3_disconnect_gadget() -> gadget_driver->disconnect() chain, and Lockdep reported: BUG: sleeping function called from invalid context gadget_disconnect+0x21/0x39 [vuln_msv] dwc3_gadget_suspend.constprop.0+0x2b/0x42 [vuln_msv] Keep the disconnect callback selection in one common helper, but add a sleepable suspend-side wrapper which snapshots the callback under dwc->lock and then runs it after spin_unlock_irqrestore(). The regular event path still uses the existing spin_unlock()/spin_lock() window.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Awaiting Analysis
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-25 10:17:30.407000
Last modified
2026-11-03 18:15:39.353000
View original CVE JSON
{
"id": "CVE-2026-64454",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-25T10:17:30.407",
"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: dwc3: run gadget disconnect from sleepable suspend context\n\ndwc3_gadget_suspend() takes dwc->lock with IRQs disabled and then calls\ndwc3_disconnect_gadget(). For async callbacks that helper only uses\nplain spin_unlock()/spin_lock(), so the gadget ->disconnect() callback\nstill runs with IRQs disabled and any sleepable callback trips Lockdep.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the dwc3_gadget_suspend() ->\ndwc3_disconnect_gadget() -> gadget_driver->disconnect() chain, and\nLockdep reported:\n\n BUG: sleeping function called from invalid context\n gadget_disconnect+0x21/0x39 [vuln_msv]\n dwc3_gadget_suspend.constprop.0+0x2b/0x42 [vuln_msv]\n\nKeep the disconnect callback selection in one common helper, but add a\nsleepable suspend-side wrapper which snapshots the callback under\ndwc->lock and then runs it after spin_unlock_irqrestore(). The regular\nevent path still uses the existing spin_unlock()/spin_lock() window."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/usb/dwc3/gadget.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
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"versionType": "git",
"status": "affected"
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{
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"status": "affected"
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},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/usb/dwc3/gadget.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.4",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.4",
"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",
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"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.4",
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"versionType": "semver",
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},
{
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"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
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}
]
}
]
}
],
"metrics": {},
"references": [
{
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}