209 lines
12 KiB
JSON
209 lines
12 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-2026-90030",
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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": "2026-09-11T19:38:34.782Z",
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"datePublished": "2026-09-16T10:33:31.801Z",
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"dateUpdated": "2026-10-21T12:49:31.009Z"
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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": "2026-10-21T12:49:31.009Z"
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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: dwc3: clear forceRM when issuing EndTransfer\n\nThe forceRM bit of the DEPCMD register controls the behavior of the\nEndTransfer command used to stop an active transfer. Older DWC3\nprogramming guide revisions recommended setting forceRM=1 when\nissuing EndTransfer. Newer programming guide revisions recommend\nissuing EndTransfer with forceRM cleared.\n\nWith forceRM=1 on DWC_usb31 v2.00a and v2.10a controllers, a transfer\naborted through the ep_dequeue path was observed to remain active\nafter EndTransfer completion. A subsequent StartTransfer issued on the\nsame endpoint triggered writes associated with the aborted transfer.\nThis resulted in an SMMU fault because the transfer buffer had already\nbeen unmapped during EndTransfer command-completion cleanup.\n\nUsing forceRM=0 eliminates the issue. Although older DWC3 programming\nguide revisions recommended setting forceRM=1, no issues are known\nfrom using forceRM=0. Clear forceRM when issuing EndTransfer to provide\nconsistent EndTransfer behavior and align with newer programming guide\nrecommendations."
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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 - The documented trigger is dwc3_gadget_ep_dequeue(), reached from FunctionFS via usb_ep_dequeue() on ordinary local syscalls (interrupted read, aio_cancel, close, FUNCTIONFS_DMABUF_DETACH) rather than USB host packet parsing; this matches AV:L used for other f_fs/dwc3 EndXfer bugs (CVE-2024-36977, CVE-2024-36894).\nAC:L - On affected DWC_usb31 controllers the attacker deterministically queues a request, dequeues it so EndTransfer runs with forceRM=1, then queues again so StartTransfer replays DMA to the already-unmapped buffer; no uncontrolled race is involved, and v2.00a/v2.10a hardware is common on Qualcomm phones and embedded boards.\nPR:L - FunctionFS endpoint nodes are routinely delegated to unprivileged gadget daemons (adbd/shell, MTP) via uid=/gid=/fmode=; queue, cancel, and re-queue are ordinary file operations and the dequeue path performs no capability check.\nUI:N - The attacking process performs the queue, dequeue, and re-queue itself; a USB cable being attached is an ambient condition of phones, kiosks, and embedded gadgets, not a separate victim action the attacker must induce.\nS:U - Stale controller DMA targets the transfer buffer the gadget had already mapped in the same kernel; this is not a VM escape or IOMMU-domain bypass, and an SMMU, when present, faults the access rather than being circumvented.\nC:H - The same EndTransfer forceRM mishandling applies to IN endpoints, so after unmap the still-active transfer can DMA-read reused pages onto the USB bus; per kernel UAF guidance this memory-corruption primitive also yields kernel disclosure once backing pages are reallocated.\nI:H - The issue was reproduced as stale DMA writes on an OUT bulk endpoint into a buffer already unmapped during EndTransfer completion cleanup, so leftover or host-supplied data is written into reallocated kernel pages, a DMA use-after-free write primitive suitable for control-flow hijacking.\nA:H - The commit reports an SMMU fault when the controller accesses the already-unmapped transfer buffer, which panics or wedges the USB/IOMMU path; without an IOMMU the same DMA use-after-free likewise oopses or panics the kernel."
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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/dwc3/ep0.c",
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"drivers/usb/dwc3/gadget.c"
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],
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"versions": [
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{
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"version": "ab99c4be945724b032cc55e05c6738fe1d84bf70",
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"lessThan": "7a50e138fa28e5ba76b11af66ed41cc300c0f2be",
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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": "1e43c86d84fb0503e82a143e017f35421498fc1a",
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"lessThan": "9f1e57c484f9edeaaa5a27a03ed985e98496e81d",
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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": "1e43c86d84fb0503e82a143e017f35421498fc1a",
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"lessThan": "0afe5c31612de3d18cc6d16e616da4a48ba1e5a2",
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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": "1e43c86d84fb0503e82a143e017f35421498fc1a",
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"lessThan": "e01408ee52fe5cb2d0b43f47f359336af2b6c316",
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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": "1e43c86d84fb0503e82a143e017f35421498fc1a",
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"lessThan": "b58e6200450d350314db0ecda7d6d1bde3281e80",
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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": "6.6.37",
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"lessThan": "6.6.160",
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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/dwc3/ep0.c",
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"drivers/usb/dwc3/gadget.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.51",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.5",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "6.6.37",
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"versionEndExcluding": "6.6.160"
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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": "6.9",
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"versionEndExcluding": "6.12.112"
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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": "6.9",
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"versionEndExcluding": "6.18.51"
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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": "6.9",
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"versionEndExcluding": "7.2.5"
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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": "6.9",
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"versionEndExcluding": "7.3"
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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/7a50e138fa28e5ba76b11af66ed41cc300c0f2be"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f1e57c484f9edeaaa5a27a03ed985e98496e81d"
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},
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{
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"url": "https://git.kernel.org/stable/c/0afe5c31612de3d18cc6d16e616da4a48ba1e5a2"
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},
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{
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"url": "https://git.kernel.org/stable/c/e01408ee52fe5cb2d0b43f47f359336af2b6c316"
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},
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{
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"url": "https://git.kernel.org/stable/c/b58e6200450d350314db0ecda7d6d1bde3281e80"
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}
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],
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"title": "usb: dwc3: clear forceRM when issuing EndTransfer",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |