Integer Underflow (Wrap or Wraparound) Affecting golioth/golioth-firmware-sdk package, versions [0.10.0,0.22.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-GOLIOTHGOLIOTHFIRMWARESDK-15367355
- published2 Mar 2026
- disclosed27 Feb 2026
- creditUnknown
Introduced: 27 Feb 2026
CVE-2026-23748 (opens in a new tab)How to fix?
Upgrade golioth/golioth-firmware-sdk to version 0.22.0 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the on_payload and golioth_payload_is_null() function which does not block payload_size==1. An attacker can cause the device to crash by sending a crafted string payload with a payload_size value less than 2, which leads to a size_t underflow and causes a subsequent memcpy() operation to read past the end of the network buffer.