CVE-2026-23749 – Golioth Firmware SDK < 0.22.0 Blockwise Transfer Path Out-of-Bounds Read

CVE ID : CVE-2026-23749

Published : Feb. 26, 2026, 6:23 p.m. | 47 minutes ago

Description : Golioth Firmware SDK version 0.19.1 prior to 0.22.0, fixed in commit 0e788217, contain an out-of-bounds read due to improper null termination of a blockwise transfer path. blockwise_transfer_init() accepts a path whose length equals CONFIG_GOLIOTH_COAP_MAX_PATH_LEN and copies it using strncpy() without guaranteeing a trailing NUL byte, leaving ctx->path unterminated. A later strlen() on this buffer (in golioth_coap_client_get_internal()) can read past the end of the allocation, resulting in a crash/denial of service. The input is application-controlled (not network by default).

Severity: 2.9 | LOW

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