{"id":"CVE-2026-23749","title":"Golioth Firmware SDK < 0.22.0 Blockwise Transfer Path Out-of-Bounds Read","summary":"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 CONF…","severity":"low","cvss":2.9,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-170"],"vendor":"Golioth","product":"Firmware SDK","affected":["firmware_sdk >= 0.19.1 < 0.22.0"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-02-27T17:55:58.632725Z"},"exploitAvailable":true,"published":"2026-02-26","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:01:24.962Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23749","references":[{"url":"https://secmate.dev/disclosures/SECMATE-2025-0017"},{"url":"https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/"},{"url":"https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0","label":"Firmware SDK 0.22.0 Release Notes"},{"url":"https://github.com/golioth/golioth-firmware-sdk/commit/0e788217ab4b61a7c1d9fadd1b4a40f5f538a26d"},{"url":"https://www.vulncheck.com/advisories/golioth-firmware-sdk-blockwise-transfer-path-out-of-bounds-read"}],"tags":["cve.org","exploit-available"],"epss":0.00184,"epssPercentile":0.0802,"ingestedAt":"2026-11-08T14:51:22.472Z","slug":"CVE-2026-23749","body":"## Overview\n\nGolioth 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).\n\n## Affected\n\n- `firmware_sdk >= 0.19.1 < 0.22.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":28,"depthScoreParts":{"impact":16,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}