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TI-2021-05508 Aliases CVE-2021-22547GHSA-q368-635x-gcfv

Buffer overrun in Google Cloud IoT Device SDK for Embedded C

Priority LOW 33CWE-120Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

In IoT Devices SDK, there is an implementation of calloc() that doesn't have a length check. An attacker could pass in memory objects larger than the buffer and wrap around to have a smaller buffer than required, allowing the attacker access to the other parts of the heap. We recommend upgrading the Google Cloud IoT Device SDK for Embedded C used to 1.0.3 or greater.

Why it matters now

EPSS 0.00217 12th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
GoogleGoogle Cloud IoT Device SDK for Embedded Cup to 1.0.2—No fix listedCNA
  • Google Cloud IoT Device SDK for Embedded C VendorGoogle Affected up to 1.0.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:google:cloud_iot_device_sdk_for_embedded_c:*:*:*:*:*:*:*:*before 1.0.3VulnerableGoogle
  • cpe:2.3:a:google:cloud_iot_device_sdk_for_embedded_c:*:*:*:*:*:*:*:* Versions before 1.0.3 Vulnerable ·Google

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22547
  2. 2026-10-03 Alias added: GHSA-q368-635x-gcfv

References

Patch 1

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences