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CVE Record

CVE-2021-47264: ASoC: core: Fix Null-point-dereference in fmt_single_name()

In the Linux kernel, the following vulnerability has been resolved: ASoC: core: Fix Null-point-dereference in fmt_single_name() Check the return value of devm_kstrdup() in case of Null-point-dereference.

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 is a null pointer dereference in the ASoC audio core. In business terms, it is most likely a stability risk for systems using affected kernels rather than a confirmed breach vector. The source bundle provides no CVSS score, no CWE, and no evidence of active exploitation.

Executive priority

Treat this as a routine kernel hygiene item unless affected systems are business-critical, embedded, or hard to patch. There is no supplied evidence of active exploitation, but kernel crashes can still affect availability on exposed operational devices.

Technical view

The flaw was resolved by checking the return value of devm_kstrdup() in fmt_single_name(). Without that check, allocation failure could lead to a null pointer dereference in Linux kernel ASoC core code. The source references Linux stable commits as fixes, but does not describe exploit prerequisites or impact beyond the dereference.

Likely exposure

Exposure appears limited to systems running affected Linux kernel versions or downstream kernels that include the vulnerable ASoC core code. The bundle lists Linux kernel versions including 5.10, 5.10.44, 5.12.11, and 5.13, but affected-version detail is incomplete and should be validated against vendor backports.

Exploitation context

The source bundle does not report active exploitation, and this CVE is not listed as KEV. No public exploit status, attack path, privilege requirement, or remote exposure is provided in the supplied evidence.

Researcher notes

The public record is sparse: no CVSS, CWE, exploit detail, or operational workaround is included. Analysis should focus on confirming patch presence in downstream kernels and understanding whether local hardware configurations exercise fmt_single_name() in the ASoC path.

Mitigation direction

  • Apply Linux vendor or distribution kernel updates containing the referenced stable fixes.
  • Confirm whether your distribution backported the fix to supported kernel packages.
  • Prioritize embedded or endpoint systems that use Linux audio or ASoC functionality.
  • If no update is available, monitor vendor guidance for supported remediation options.

Validation and detection

  • Inventory running Linux kernel versions across servers, endpoints, and embedded devices.
  • Map kernels against vendor advisories and the referenced stable commits.
  • Check whether affected systems use ASoC or related audio drivers.
  • Review kernel crash logs for null pointer dereference patterns in ASoC code.
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-2021-47264 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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux45dd9943fce08f1b38352ff9453682253bdf19b7, 45dd9943fce08f1b38352ff9453682253bdf19b7, 45dd9943fce08f1b38352ff9453682253bdf19b7unaffected
LinuxLinux5.10, 0, 5.10.44, 5.12.11, 5.13affected
Weakness

CWE details

No CWE listed

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