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CVE Record

CVE-2021-47381: ASoC: SOF: Fix DSP oops stack dump output contents

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: Fix DSP oops stack dump output contents Fix @buf arg given to hex_dump_to_buffer() and stack address used in dump error output.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue affects error reporting in the ASoC SOF audio DSP path. The fix corrects what buffer and stack address are used when dumping DSP oops data. Public sources do not describe a direct business impact, remote attack path, or active exploitation.

Executive priority

Treat as a low-drama tracking item unless affected kernels are widely deployed in managed endpoints. The main urgency is ensuring routine kernel patching covers it, because public sources do not establish severe impact or exploitation.

Technical view

CVE-2021-47381 is a Linux kernel ASoC SOF bug in DSP oops stack dump handling. The resolved change fixes the buffer argument passed to hex_dump_to_buffer() and the stack address used in dump output. Severity, CVSS, CWE, and exploitation details are not provided in the bundle.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with the ASoC SOF audio DSP code path present. The source bundle lists Linux kernel version data but lacks complete distribution package mapping.

Exploitation context

The CVE is not listed as CISA KEV in the provided bundle, and no cited source states active exploitation. The public description only identifies a kernel bug fix in diagnostic dump handling, not an exploit scenario.

Researcher notes

Evidence is sparse. The useful technical anchors are the Linux stable commit references and the short kernel description. Avoid assuming memory disclosure, privilege escalation, or exploitability unless vendor advisories or kernel analysis provide that evidence.

Mitigation direction

  • Check Linux vendor or distribution advisories for CVE-2021-47381 coverage.
  • Update affected systems to kernel packages containing the referenced stable fixes.
  • Prioritize systems using ASoC SOF audio DSP functionality.
  • Track this through normal kernel vulnerability management until vendor severity is known.

Validation and detection

  • Inventory kernel versions across Linux endpoints and appliances.
  • Confirm whether ASoC SOF-related kernel components are present or enabled.
  • Compare installed kernel changelogs against the referenced stable commits.
  • Record vendor advisory status where distribution backports are used.
Prepared
Confidence
medium
Sources
4

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-2021-47381 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
3Source 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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe657c18a01c85d2c4ec0e96d52be8ba42b956593, e657c18a01c85d2c4ec0e96d52be8ba42b956593unaffected
LinuxLinux5.2, 0, 5.14.10, 5.15affected
Weakness

CWE details

No CWE listed

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