CVE-2023-23298: Garmin Connect-Iq

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

The `Toybox.Graphics.BufferedBitmap.initialize` API method in CIQ API version 2.3.0 through 4.1.7 does not validate its parameters, which can result in integer overflows when allocating the underlying bitmap buffer. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.

Affected products

• Garmin Connect-Iq: from 2.3.0, up to and including 4.1.7

Published 2023-05-23. Last modified 2026-06-17.