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CVE Record

CVE-2021-47188: scsi: ufs: core: Improve SCSI abort handling

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE is a Linux kernel storage-driver issue in UFS/SCSI abort handling. The public record shows a kernel warning caused by command state not being cleared during abort handling. Business impact is unclear from available sources, but affected Linux systems should receive vendor-supported kernel updates containing the stable fixes.

Executive priority

Treat this as a normal kernel maintenance item unless vendor advisories assign higher severity for your platform. There is no source-supported evidence of active exploitation or broad remote attackability.

Technical view

The fix clears lrbp->cmd in the UFS abort handler to prevent ufshcd_queuecommand from hitting WARN_ON(lrbp->cmd) during SCSI error handling. Sources list Linux kernel affected versions and stable kernel commits, but provide no CVSS, CWE, exploit details, or confirmed security impact category.

Likely exposure

Exposure appears limited to Linux systems using the kernel UFS storage driver and affected kernel versions. Confirm exposure through kernel version, vendor backport status, and hardware/storage controller usage.

Exploitation context

No active exploitation is supported by the provided sources. The CVE is not listed as KEV, and the bundle contains no public exploit claim or attack scenario.

Researcher notes

The record describes a correctness fix in the SCSI UFS error path. Impact evidence is sparse: no CVSS, CWE, exploitability statement, or user-triggered attack path is provided. Analysis should focus on affected-kernel mapping and vendor backport confirmation.

Mitigation direction

  • Check your Linux distribution or appliance vendor advisory for this CVE.
  • Update to a supported kernel build that includes the cited stable fixes.
  • Prioritize systems using UFS storage hardware or affected embedded/mobile Linux kernels.
  • Track vendor backports instead of relying only on upstream version strings.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Identify systems using the UFS kernel driver or UFS storage hardware.
  • Confirm whether vendor kernels include the referenced stable commits or equivalent backports.
  • Review kernel logs for related ufshcd_queuecommand or SCSI error-handler warnings.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-47188 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux7a3e97b0dc4bbac2ba7803564ab0057722689921, 7a3e97b0dc4bbac2ba7803564ab0057722689921, 7a3e97b0dc4bbac2ba7803564ab0057722689921unaffected
LinuxLinux3.4, 0, 5.10.258, 5.15.5, 5.16affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.