{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47188", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.113Z", "datePublished": "2024-04-10T18:56:27.567Z", "dateUpdated": "2026-08-05T08:46:34.863Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:46:34.863Z" }, "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/ufs/ufshcd.c" ], "versions": [ { "version": "7a3e97b0dc4bbac2ba7803564ab0057722689921", "lessThan": "9491bc16082d9a402c9099acbfffc89af6f9316f", "status": "affected", "versionType": "git" }, { "version": "7a3e97b0dc4bbac2ba7803564ab0057722689921", "lessThan": "c36baca06efa833adaefba61f45fefdc49b6d070", "status": "affected", "versionType": "git" }, { "version": "7a3e97b0dc4bbac2ba7803564ab0057722689921", "lessThan": "3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/ufs/ufshcd.c" ], "versions": [ { "version": "3.4", "status": "affected" }, { "version": "0", "lessThan": "3.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "5.15.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9491bc16082d9a402c9099acbfffc89af6f9316f" }, { "url": "https://git.kernel.org/stable/c/c36baca06efa833adaefba61f45fefdc49b6d070" }, { "url": "https://git.kernel.org/stable/c/3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566" } ], "title": "scsi: ufs: core: Improve SCSI abort handling", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.411Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/c36baca06efa833adaefba61f45fefdc49b6d070", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-47188", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:50:11.298126Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:39.156Z" } } ] } }