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CVE Record

CVE-2021-47643: media: ir_toy: free before error exiting

In the Linux kernel, the following vulnerability has been resolved: media: ir_toy: free before error exiting Fix leak in error path.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-47643 is a Linux kernel defect in the ir_toy media driver. The public record describes a memory leak on an error path, fixed by freeing memory before exiting. The sources do not provide business impact, CVSS score, or evidence of exploitation.

Executive priority

Handle through normal kernel maintenance unless local exposure shows the driver is used on sensitive systems. There is no sourced CVSS score or exploitation evidence, so emergency response is not justified by the provided data alone.

Technical view

The issue is described as "media: ir_toy: free before error exiting" and "Fix leak in error path." Kernel stable commits are listed as the resolution. The provided data does not identify a CWE, attack vector, privilege requirement, or concrete security impact beyond the leak.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with the ir_toy driver relevant or present. The source bundle lists Linux 5.9, 5.10.110, 5.15.33, 5.16.19, 5.17.2, and 5.18, but range semantics are incomplete.

Exploitation context

The source bundle marks KEV as false and provides no cited evidence of active exploitation, public exploit availability, or practical exploit conditions. Treat exploitation status as unknown, not actively exploited.

Researcher notes

Evidence is thin. The record names a memory leak in an error path and links stable kernel commits, but does not document reachable inputs, security boundaries, or impact. Validate using kernel source history and downstream distro patch status before assigning urgency.

Mitigation direction

  • Check your distribution's kernel advisory for CVE-2021-47643.
  • Update to a kernel containing the listed stable fixes.
  • Prioritize systems using media or IR Toy related kernel functionality.
  • If updates are delayed, follow vendor guidance for disabling affected driver exposure.

Validation and detection

  • Inventory Linux kernel versions across servers, workstations, and appliances.
  • Check whether the ir_toy driver is built, loaded, or available.
  • Confirm installed kernels include one of the referenced stable fixes.
  • Track distribution advisories for backported patches under different version numbers.
Prepared
Confidence
medium
Sources
7

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-2021-47643 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
0ADP providers
6Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux261463dbc34ff0acafe4d84df04535b48a15afea, 261463dbc34ff0acafe4d84df04535b48a15afea, 261463dbc34ff0acafe4d84df04535b48a15afea, 261463dbc34ff0acafe4d84df04535b48a15afea, 261463dbc34ff0acafe4d84df04535b48a15afeaunaffected
LinuxLinux5.9, 0, 5.10.110, 5.15.33, 5.16.19, 5.17.2, 5.18affected
Weakness

CWE details

No CWE listed

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