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CVE Record

CVE-2021-47565: scsi: mpt3sas: Fix kernel panic during drive powercycle test

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Fix kernel panic during drive powercycle test While looping over shost's sdev list it is possible that one of the drives is getting removed and its sas_target object is freed but its sdev object remains intact. Consequently, a kernel panic can occur while the driver is trying to access the sas_address field of sas_target object without also checking the sas_target object for NULL.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can crash a system when the mpt3sas storage driver handles a drive removal or power-cycle race incorrectly. The likely business impact is availability loss on affected hosts, not data theft based on the provided sources.

Executive priority

Treat as a targeted infrastructure stability issue. Prioritize storage-heavy or critical Linux servers first, especially where unexpected reboot or panic would disrupt operations.

Technical view

The mpt3sas SCSI driver can dereference sas_target after it has been freed while the sdev object remains. Missing NULL validation before reading sas_target->sas_address can cause a kernel panic during drive powercycle or removal conditions.

Likely exposure

Exposure is most likely on Linux systems using the mpt3sas SCSI driver with affected kernel versions or unpatched distro backports. Systems without this driver or relevant storage hardware are less likely to be affected.

Exploitation context

The source bundle does not show active exploitation, and KEV is false. The described trigger is a drive powercycle/removal race, suggesting availability impact under specific storage conditions rather than a proven remote attack path.

Researcher notes

Evidence supports a NULL pointer dereference style kernel panic in mpt3sas during sdev iteration and sas_target lifetime changes. No CVSS, CWE, exploit proof, or detailed vendor-specific package status is included in the bundle.

Mitigation direction

  • Update to a kernel or vendor distro package containing the referenced stable fixes.
  • Check your Linux distribution advisory for backported fixes for CVE-2021-47565.
  • Prioritize hosts using mpt3sas-backed storage or experiencing drive removal events.
  • Plan maintenance because kernel updates usually require rebooting affected hosts.

Validation and detection

  • Inventory Linux hosts and identify kernels within the affected version ranges.
  • Confirm whether the mpt3sas driver is loaded or required on each host.
  • Check distro changelogs for CVE-2021-47565 or the upstream stable commit references.
  • Review kernel panic logs for mpt3sas activity during drive powercycle or removal events.
Prepared
Confidence
high
Sources
10

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-2021-47565 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
9Source 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
LinuxLinuxf92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2, f92363d12359498f9a9960511de1a550f0ec41c2unaffected
LinuxLinux3.8, 0, 4.4.294, 4.9.292, 4.14.257, 4.19.219, 5.4.163, 5.10.83, 5.15.6, 5.16affected
Weakness

CWE details

No CWE listed

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