PT-2026-22167 · Unknown · Golioth Firmware Sdk

Secmate · Published 2026-02-26 · Updated 2026-02-26 · CVE-2026-23748

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Golioth Firmware SDK versions 0.10.0 through 0.21.9

Description The software contains an out-of-bounds read issue in LightDB State string parsing. A small payload size value (less than 2) can lead to a size t underflow when calculating the number of bytes to copy during string processing. This results in a memcpy() operation reading beyond the allocated network buffer, potentially causing a device crash. This condition is reachable through the on payload function, and the golioth payload is null() function does not prevent payloads of size 1 from being processed. A malicious server or a man-in-the-middle (MITM) attacker can trigger a denial of service.

Recommendations Update to version 0.22.0 or later.

Exploit

Fix

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

CVE-2026-23748

Affected Products

Golioth Firmware Sdk

References · 8

• 🔥 https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure · Exploit
• https://github.com/golioth/golioth-firmware-sdk/commit/d7f55b380d8be8b29bd101ce06e421af2e88c12b · Patch
• https://osv.dev/vulnerability/CVE-2026-23748 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23748 · Security Note
• https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0 · Note
• https://twitter.com/CVEnew/status/2027099244319158708 · Twitter Post
• https://secmate.dev/disclosures/SECMATE-2025-0016 · Note
• https://vulncheck.com/advisories/golioth-firmware-sdk-lightdb-state-out-of-bounds-read · Note