215 lines
11 KiB
JSON
215 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-2021-47188",
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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": "2024-03-25T09:12:14.113Z",
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"datePublished": "2024-04-10T18:56:27.567Z",
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"dateUpdated": "2026-08-05T08:46:34.863Z"
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},
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:46:34.863Z"
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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\nscsi: ufs: core: Improve SCSI abort handling\n\nThe following has been observed on a test setup:\n\nWARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c\nCall trace:\n ufshcd_queuecommand+0x468/0x65c\n scsi_send_eh_cmnd+0x224/0x6a0\n scsi_eh_test_devices+0x248/0x418\n scsi_eh_ready_devs+0xc34/0xe58\n scsi_error_handler+0x204/0x80c\n kthread+0x150/0x1b4\n ret_from_fork+0x10/0x30\n\nThat warning is triggered by the following statement:\n\n\tWARN_ON(lrbp->cmd);\n\nFix this warning by clearing lrbp->cmd from the abort handler."
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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 bug is in the UFS host controller's local SCSI abort/completion path (ufshcd_abort → stale lrbp->cmd), reached only via local block/filesystem I/O and the SCSI error handler on the device's UFS storage controller, not via any network or adjacent protocol.\nAC:L - A local attacker can drive concurrent deep-queue UFS I/O that induces command timeouts and abort handling, and once abort succeeds the stale lrbp->cmd path is deterministic; similar UFS abort races are hit under ordinary load without conditions outside the attacker's influence.\nPR:L - An unprivileged local user with ordinary filesystem or block I/O access to UFS-backed storage (typical on Android phones and embedded devices) can submit the traffic that times out and enters ufshcd_abort; root or special capabilities are not required.\nUI:N - Exploitation is driven entirely by the attacker's own I/O and the kernel's SCSI timeout/error-handler threads; no separate victim action such as mounting a volume or opening a file is required.\nS:U - Impact stays inside the host kernel's security authority (corrupt/crash the UFS driver and kernel memory); this is not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - Leaving lrbp->cmd set after a successful abort creates a dangling pointer to a scsi_cmnd that the midlayer may finish and free/reuse; a later transfer_req_compl pass then reads through that object (status/monitor/trace paths), which is a use-after-free enabling arbitrary kernel memory disclosure.\nI:H - The same stale-cmd completion path can scsi_dma_unmap and write cmd->result on a reused scsi_cmnd, and may scsi_done a recycled command—heap corruption and control-flow integrity compromise consistent with a UAF write primitive.\nA:H - The bug produces WARN_ON in ufshcd_queuecommand during EH and use-after-free crashes/oopses in the completion path on the system's primary storage controller, which panics or permanently wedges the device under typical Android/embedded panic_on_oops settings."
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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/scsi/ufs/ufshcd.c"
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],
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"defaultStatus": "affected",
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"programFiles": [
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"drivers/scsi/ufs/ufshcd.c"
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],
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"versions": [
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"version": "3.4",
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"version": "0",
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"lessThan": "3.4",
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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": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.5",
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"lessThanOrEqual": "5.15.*",
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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": "5.16",
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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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"references": [
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"url": "https://git.kernel.org/stable/c/9491bc16082d9a402c9099acbfffc89af6f9316f"
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}
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"title": "scsi: ufs: core: Improve SCSI abort handling",
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"content": {
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"id": "CVE-2021-47188",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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