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CVE Record

CVE-2021-47210: usb: typec: tipd: Remove WARN_ON in tps6598x_block_read

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tipd: Remove WARN_ON in tps6598x_block_read Calling tps6598x_block_read with a higher than allowed len can be handled by just returning an error. There's no need to crash systems with panic-on-warn enabled.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can crash systems that treat kernel warnings as fatal. The described trigger is an oversized read length inside a USB Type-C TPS6598x driver path. The sources do not show data theft, privilege escalation, or active exploitation.

Executive priority

Treat as a targeted availability risk, not an emergency internet-wide issue. Patch through normal kernel maintenance, with higher priority for devices where unexpected reboot or downtime has operational impact.

Technical view

The fix removes a WARN_ON from tps6598x_block_read and returns an error when len exceeds the allowed size. On kernels configured with panic-on-warn, the prior behavior could turn a recoverable driver input error into a system panic.

Likely exposure

Exposure appears limited to affected Linux kernels using the USB Type-C TPS6598x/TIPD driver path, especially where panic-on-warn is enabled. The provided data lists affected kernel ranges but does not identify specific distributions or appliances.

Exploitation context

The CVE is not marked KEV, and the source bundle provides no evidence of active exploitation or a public exploit. The practical impact described is denial of service through kernel panic under specific driver and configuration conditions.

Researcher notes

The public record lacks CVSS, CWE, exploitability detail, and distribution mapping. Analysis should focus on the exact driver call path, affected kernel backports, and whether any reachable input can cause an oversized tps6598x_block_read length.

Mitigation direction

  • Update to a kernel build containing the referenced stable fixes.
  • Check distribution or appliance vendor advisories for CVE-2021-47210.
  • Prioritize systems using USB Type-C PD controller hardware.
  • Review panic-on-warn policy with platform owners before changing it.
  • Validate USB Type-C behavior after kernel updates.

Validation and detection

  • Inventory Linux kernel versions across affected fleets.
  • Confirm whether the TPS6598x/TIPD driver is present or used.
  • Verify vendor kernels include one of the referenced stable commits.
  • Check whether panic-on-warn is enabled on relevant systems.
  • Review post-update logs for USB Type-C driver errors.
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-2021-47210 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux0a4c005bd1715d8b32a368ed5516a6ee7e603d18, 0a4c005bd1715d8b32a368ed5516a6ee7e603d18, 0a4c005bd1715d8b32a368ed5516a6ee7e603d18, 0a4c005bd1715d8b32a368ed5516a6ee7e603d18, 0a4c005bd1715d8b32a368ed5516a6ee7e603d18unaffected
LinuxLinux4.15, 0, 4.19.218, 5.4.162, 5.10.82, 5.15.5, 5.16affected
Weakness

CWE details

No CWE listed

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