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CVE Record

CVE-2021-47150: net: fec: fix the potential memory leak in fec_enet_init()

In the Linux kernel, the following vulnerability has been resolved: net: fec: fix the potential memory leak in fec_enet_init() If the memory allocated for cbd_base is failed, it should free the memory allocated for the queues, otherwise it causes memory leak. And if the memory allocated for the queues is failed, it can return error directly.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-47150 is a Linux kernel memory leak in the FEC network driver initialization path. If one allocation fails, previously allocated queue memory may not be freed. The sources do not show active exploitation, CVSS scoring, or a broad remote attack scenario.

Executive priority

Treat this as a low-urgency maintenance item unless affected FEC-driver systems are critical or vendor guidance assigns higher severity. There is no source-backed evidence of active exploitation, but kernel memory leaks still warrant routine patching.

Technical view

The flaw is in fec_enet_init(). When cbd_base allocation fails after queue allocation, the driver can leak queue memory instead of releasing it. Stable kernel commits are referenced as fixes. Public data does not provide CWE, CVSS, exploitability conditions, or detailed security impact.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions where the FEC network driver code is present and relevant. The bundle lists Linux kernels including 3.18, 4.19.193, 5.4.124, 5.10.42, 5.12.9, and 5.13 as affected.

Exploitation context

No cited source reports exploitation in the wild, and the CVE is not listed as KEV. Available evidence describes a memory leak on an allocation-failure path during driver initialization, not a confirmed remote compromise path.

Researcher notes

The strongest evidence is the kernel fix description and stable commit references. Important gaps remain: no CVSS, CWE, proof of exploitability, trigger detail, or operational impact beyond memory leakage during fec_enet_init() error handling.

Mitigation direction

  • Check Linux vendor or distribution advisories for fixed kernel packages.
  • Update affected kernels to versions containing the referenced stable fixes.
  • Prioritize systems where the FEC network driver is used.
  • Track this as kernel maintenance unless vendor guidance raises severity.

Validation and detection

  • Inventory Linux kernel versions across relevant assets.
  • Confirm whether the FEC network driver is built or loaded.
  • Compare installed kernels against vendor fixed-version guidance.
  • Review kernel package changelogs for the referenced stable commits.
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-2021-47150 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
6Source 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
LinuxLinux59d0f746564495c7f54526674deabfcf101236a1, 59d0f746564495c7f54526674deabfcf101236a1, 59d0f746564495c7f54526674deabfcf101236a1, 59d0f746564495c7f54526674deabfcf101236a1, 59d0f746564495c7f54526674deabfcf101236a1unaffected
LinuxLinux3.18, 0, 4.19.193, 5.4.124, 5.10.42, 5.12.9, 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.