LiveActive security incident?Get immediate response
CVE Record

CVE-2021-47409: usb: dwc2: check return value after calling platform_get_resource()

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: check return value after calling platform_get_resource() It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-47409 is a Linux kernel flaw in the USB dwc2 driver. If a required platform resource lookup fails, the driver can dereference a null pointer and crash kernel code. The public record does not provide CVSS, confirmed exploit activity, or detailed real-world impact beyond the null-pointer dereference.

Executive priority

Treat this as a targeted kernel availability issue, not a confirmed internet-scale emergency. Prioritize patch tracking for embedded, appliance, and USB-dependent Linux assets, especially where outages would affect operations.

Technical view

The dwc2 USB driver called platform_get_resource() without validating a NULL return. The kernel fix adds return-value checking to avoid a null-pointer dereference. The affected data lists Linux kernel versions including 4.11 and stable lines around 4.14.250, 4.19.210, 5.4.152, 5.10.72, 5.14.11, and 5.15.

Likely exposure

Exposure is most likely on Linux systems that include and use the dwc2 USB driver, commonly tied to USB OTG/controller support. The source bundle does not identify specific distributions, devices, appliances, or cloud platforms.

Exploitation context

The CVE is not listed as KEV in the provided bundle. No cited source confirms active exploitation or public exploit availability. Based on the description, the known consequence is a null-pointer dereference, which usually maps to availability risk rather than data theft.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. The bundle does not include CVSS, CWE, exploitability detail, attack prerequisites, or distribution advisories. Avoid assuming remote reachability or broad exploitability without device-specific validation.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes.
  • Use distribution or device-vendor kernel packages rather than self-selecting commits when possible.
  • Check vendor advisories for backported fixes on supported kernel branches.
  • Prioritize systems where dwc2 USB support is enabled and operationally important.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded devices.
  • Check whether the dwc2 driver is present, built, or loaded.
  • Compare vendor kernel changelogs against the referenced upstream stable commits.
  • Confirm patched kernels boot and USB functions still work in regression testing.
Prepared
Confidence
medium
Sources
8

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-47409 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
7Source 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
LinuxLinux348becdcc3196addbe882e8a10451744e489e389, 348becdcc3196addbe882e8a10451744e489e389, 348becdcc3196addbe882e8a10451744e489e389, 348becdcc3196addbe882e8a10451744e489e389, 348becdcc3196addbe882e8a10451744e489e389, 348becdcc3196addbe882e8a10451744e489e389unaffected
LinuxLinux4.11, 0, 4.14.250, 4.19.210, 5.4.152, 5.10.72, 5.14.11, 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.