Vulnerability Description
Golioth Firmware SDK version 0.10.0 prior to 0.22.0, fixed in commit d7f55b38, contain an out-of-bounds read in LightDB State string parsing. When processing a string payload, a payload_size value less than 2 can cause a size_t underflow when computing the number of bytes to copy (nbytes). The subsequent memcpy() reads past the end of the network buffer, which can crash the device. The condition is reachable from on_payload, and golioth_payload_is_null() does not block payload_size==1. A malicious server or MITM can trigger a denial of service.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/
- https://github.com/golioth/golioth-firmware-sdk/commit/d7f55b380d8be8b29bd101ce0
- https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0
- https://secmate.dev/disclosures/SECMATE-2025-0016
- https://www.vulncheck.com/advisories/golioth-firmware-sdk-lightdb-state-out-of-b
FAQ
What is CVE-2026-23748?
CVE-2026-23748 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 d7f55b38, contain an out-of-bounds read in LightDB State string parsing. When processing a string payload, a payload_size value les...
How severe is CVE-2026-23748?
CVE-2026-23748 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-2026-23748?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.