Vulnerability Description
Golioth Firmware SDK version 0.10.0 prior to 0.22.0, fixed in commit 48f521b, contain a stack-based buffer overflow in Payload Utils. The golioth_payload_as_int() and golioth_payload_as_float() helpers copy network-supplied payload data into fixed-size stack buffers using memcpy() with a length derived from payload_size. The only length checks are guarded by assert(); in release builds, the asserts are compiled out and memcpy() may copy an unbounded payload_size. Payloads larger than 12 bytes (int) or 32 bytes (float) can overflow the stack, resulting in a crash/denial of service. This is reachable via LightDB State on_payload with a malicious server or MITM.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/
- https://github.com/golioth/golioth-firmware-sdk/commit/48f521bcc0187ada2b9cbdad3
- https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0
- https://secmate.dev/disclosures/SECMATE-2025-0015
- https://www.vulncheck.com/advisories/golioth-firmware-sdk-payload-utils-stack-ba
FAQ
What is CVE-2026-23747?
CVE-2026-23747 is a vulnerability with a CVSS score of 3.7 (LOW). Golioth Firmware SDK version 0.10.0 prior to 0.22.0, fixed in commit 48f521b, contain a stack-based buffer overflow in Payload Utils. The golioth_payload_as_int() and golioth_payload_as_float() helper...
How severe is CVE-2026-23747?
CVE-2026-23747 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23747?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.