CVE-2021-47188 (GCVE-0-2021-47188)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2026-08-05 08:46
VLAI
Title
scsi: ufs: core: Improve SCSI abort handling
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Improve SCSI abort handling The following has been observed on a test setup: WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c Call trace: ufshcd_queuecommand+0x468/0x65c scsi_send_eh_cmnd+0x224/0x6a0 scsi_eh_test_devices+0x248/0x418 scsi_eh_ready_devs+0xc34/0xe58 scsi_error_handler+0x204/0x80c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 That warning is triggered by the following statement: WARN_ON(lrbp->cmd); Fix this warning by clearing lrbp->cmd from the abort handler.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:50 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7a3e97b0dc4bbac2ba7803564ab0057722689921 , < 9491bc16082d9a402c9099acbfffc89af6f9316f (git)
Affected: 7a3e97b0dc4bbac2ba7803564ab0057722689921 , < c36baca06efa833adaefba61f45fefdc49b6d070 (git)
Affected: 7a3e97b0dc4bbac2ba7803564ab0057722689921 , < 3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566 (git)
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Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"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\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.411Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"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\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.878Z\"}}], \"cna\": {\"title\": \"scsi: ufs: core: Improve SCSI abort handling\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The bug is in the UFS host controller\u0027s local SCSI abort/completion path (ufshcd_abort \\u2192 stale lrbp-\u003ecmd), reached only via local block/filesystem I/O and the SCSI error handler on the device\u0027s 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-\u003ecmd path is deterministic; similar UFS abort races are hit under ordinary load without conditions outside the attacker\u0027s 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\u0027s own I/O and the kernel\u0027s 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\u0027s 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-\u003ecmd 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-\u003eresult on a reused scsi_cmnd, and may scsi_done a recycled command\\u2014heap 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\u0027s primary storage controller, which panics or permanently wedges the device under typical Android/embedded panic_on_oops settings.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7a3e97b0dc4bbac2ba7803564ab0057722689921\", \"lessThan\": \"9491bc16082d9a402c9099acbfffc89af6f9316f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7a3e97b0dc4bbac2ba7803564ab0057722689921\", \"lessThan\": \"c36baca06efa833adaefba61f45fefdc49b6d070\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7a3e97b0dc4bbac2ba7803564ab0057722689921\", \"lessThan\": \"3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/scsi/ufs/ufshcd.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.258\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/scsi/ufs/ufshcd.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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-\u003ecmd);\\n\\nFix this warning by clearing lrbp-\u003ecmd from the abort handler.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.258\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.5\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"3.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:46:34.863Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47188\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:46:34.863Z\", \"dateReserved\": \"2024-03-25T09:12:14.113Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-10T18:56:27.567Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.