181 lines
11 KiB
JSON
181 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53580",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-10-04T15:14:15.926Z",
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"datePublished": "2025-10-04T15:43:57.064Z",
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"dateUpdated": "2026-08-05T09:14:56.489Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:14:56.489Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: Gadget: core: Help prevent panic during UVC unconfigure\n\nAvichal Rakesh reported a kernel panic that occurred when the UVC\ngadget driver was removed from a gadget's configuration. The panic\ninvolves a somewhat complicated interaction between the kernel driver\nand a userspace component (as described in the Link tag below), but\nthe analysis did make one thing clear: The Gadget core should\naccomodate gadget drivers calling usb_gadget_deactivate() as part of\ntheir unbind procedure.\n\nCurrently this doesn't work. gadget_unbind_driver() calls\ndriver->unbind() while holding the udc->connect_lock mutex, and\nusb_gadget_deactivate() attempts to acquire that mutex, which will\nresult in a deadlock.\n\nThe simple fix is for gadget_unbind_driver() to release the mutex when\ninvoking the ->unbind() callback. There is no particular reason for\nit to be holding the mutex at that time, and the mutex isn't held\nwhile the ->bind() callback is invoked. So we'll drop the mutex\nbefore performing the unbind callback and reacquire it afterward.\n\nWe'll also add a couple of comments to usb_gadget_activate() and\nusb_gadget_deactivate(). Because they run in process context they\nmust not be called from a gadget driver's ->disconnect() callback,\nwhich (according to the kerneldoc for struct usb_gadget_driver in\ninclude/linux/usb/gadget.h) may run in interrupt context. This may\nhelp prevent similar bugs from arising in the future."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Both halves of the bug are reached through local interfaces — V4L2 file operations on the UVC gadget's `/dev/videoX` node and gadget (re)configuration via configfs/driver model — not through USB bus traffic from a host or over a network.\nAC:L - The attacker controls one side of the race entirely (when to open/subscribe/close the V4L2 handle) and gets an explicit signal plus a ~1.5 s window (device-removal uevent followed by `uvc_function_unbind()`'s 500 ms + 1000 ms timeouts), so the deadlock and subsequent use-after-free can be hit reliably and repeatedly.\nPR:L - An unprivileged local user with access to the UVC gadget video node (commonly group `video` on embedded, kiosk, and Android-derived devices) can hold the handle open and subscribed, which is all that is needed to turn gadget teardown into a deadlock and use-after-free; no root or capability is required on the attacking side.\nUI:N - Gadget unbind is driven by routine system events on affected devices (USB mode/role switches, cable-driven reconfiguration by system daemons, dwc3 DRD role change), not by a deliberate action of a separate victim user.\nS:U - The deadlock and the resulting use-after-free are confined to the kernel of the affected system; no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - After the deadlock breaks, the release path operates on a destroyed workqueue and freed endpoint/request/descriptor objects; a local attacker who reclaims those allocations during the long, attacker-observable window obtains a kernel-memory read primitive.\nI:H - The same use-after-free — `cancel_work_sync()`/`queue_work()` on a freed `async_wq` and `usb_ep_dequeue()` on torn-down endpoints — dereferences attacker-groomable heap contents including function pointers, giving a write/control-flow-hijack primitive.\nA:H - The reported outcome is a kernel panic during UVC unconfigure, and the direct-call variant self-deadlocks on `udc->connect_lock` in uninterruptible state, permanently wedging the task and the entire USB gadget subsystem."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/usb/gadget/udc/core.c"
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],
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"versions": [
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{
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"version": "d8195536ce2624e2947d9f56b1a61e7a27874bd3",
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"lessThan": "bed19d95fcb9c98dfaa9585922b39a2dfba7898d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "286d9975a838d0a54da049765fa1d1fb96b89682",
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"lessThan": "8c1edc00db65f6d4408b3d1cd845e8da3b9e0ca4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "286d9975a838d0a54da049765fa1d1fb96b89682",
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"lessThan": "65dadb2beeb7360232b09ebc4585b54475dfee06",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "85102a45c7390caf124a3a5796574446f1e037b9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.1.35",
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"lessThan": "6.1.46",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.3.9",
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"lessThan": "6.4",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/usb/gadget/udc/core.c"
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],
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"versions": [
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{
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"version": "6.4",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.4",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.46",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.4.11",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1.35",
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"versionEndExcluding": "6.1.46"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "6.4.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "6.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3.9"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/bed19d95fcb9c98dfaa9585922b39a2dfba7898d"
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},
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{
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"url": "https://git.kernel.org/stable/c/8c1edc00db65f6d4408b3d1cd845e8da3b9e0ca4"
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},
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{
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"url": "https://git.kernel.org/stable/c/65dadb2beeb7360232b09ebc4585b54475dfee06"
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}
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],
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"title": "USB: Gadget: core: Help prevent panic during UVC unconfigure",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |