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CVE Record

CVE-2021-47030: mt76: mt7615: fix memory leak in mt7615_coredump_work

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7615: fix memory leak in mt7615_coredump_work Similar to the issue fixed in mt7921_coredump_work, fix a possible memory leak in mt7615_coredump_work routine.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-47030 is a Linux kernel issue in the MediaTek mt76/mt7615 wireless driver. The coredump work routine could leak memory. The public record does not provide CVSS, active exploitation evidence, or a detailed impact statement, so urgency depends on whether affected kernels and this driver are present.

Executive priority

Handle through routine kernel patch management, with higher priority for laptops, appliances, or embedded systems using MediaTek mt7615 wireless hardware. Current public evidence does not support emergency escalation.

Technical view

The Linux kernel fix addresses a possible memory leak in mt7615_coredump_work, similar to a prior mt7921 coredump issue. The source bundle identifies affected Linux 5.12-era versions and stable kernel commits as references, but does not document trigger conditions, privilege requirements, or exploitability.

Likely exposure

Exposure appears limited to systems running affected Linux kernel versions with the mt76 mt7615 wireless driver path present. Servers without this hardware or driver are less likely to be exposed, based on the available description.

Exploitation context

The provided sources do not show CISA KEV listing, active exploitation, public exploit details, or weaponized use. Treat this as a kernel maintenance issue unless local evidence shows affected wireless driver use on important systems.

Researcher notes

Evidence is sparse: no CVSS, CWE, detailed affected matrix, or exploitation analysis is provided. The strongest source-grounded conclusion is a fixed Linux kernel memory leak in mt7615 coredump handling, with exposure tied to driver and kernel presence.

Mitigation direction

  • Update affected Linux kernels through the normal vendor or distribution channel.
  • Prioritize systems using MediaTek mt7615 or mt76 wireless functionality.
  • Check whether vendor kernel builds include the referenced stable fixes.
  • Monitor Linux distribution advisories for backported fixes and package availability.

Validation and detection

  • Inventory kernel versions against the affected 5.12-era range in the CVE record.
  • Identify hosts loading or shipping the mt76 mt7615 driver.
  • Confirm installed kernel source or changelog includes the referenced stable commits.
  • Review system monitoring for abnormal memory growth on affected wireless systems.
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-2021-47030 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd2bf7959d9c0f631ef860edaf834d55773fdedff, d2bf7959d9c0f631ef860edaf834d55773fdedffunaffected
LinuxLinux5.12, 0, 5.12.4, 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.