CVE-2021-22547

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-120

Affected software

VendorProductVersions
Google LLCGoogle Cloud IoT Device SDK for Embedded C>= unspecified, <= 1.0.2

References

Timeline

Published
May 4, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-22547: High severity, CVSS 7.8 | Vulnix