{"schema":"threatline.record/2","record":{"id":"CVE-2026-102692","aliases":["GHSA-8365-gj33-rgpf"],"summary":"RIOT: Potential integer overflow in nanocoap Block2 handling leading to out-of-bounds memory access","details":"RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on 32-bit targets. The affected master baseline is commit aeeae69e; the verified fix is later on master and remains unreleased. The oversized value passes from coap_get_blockopt() to coap_block_slicer_init(). A remote CoAP client can send a malformed Block2 option that produces an invalid slice range and can cause out-of-bounds memory access, denial of service, or memory corruption. This vulnerability is fixed in 2026.07.","categories":["Unclassified"],"product":"RIOT","vendor":"RIOT-OS","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102692","source_modified_at":"2026-10-16T21:20:02.887Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"RIOT","vendor":"RIOT-OS","versions":[{"status":"affected","version":"< 2026.07"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-8365-gj33-rgpf","source_modified_at":"2026-09-29T17:22:29Z","fetched_at":"2026-10-23T20:00:35.122048Z","package":{"ecosystem":"","name":"RIOT"},"range":"<= master (commit aeeae69e)"}],"fixed_versions":[],"cvss":9.1,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.0035,"percentile":0.27483,"score_date":"2026-10-23"},"published_at":"2026-10-16T16:48:35.776Z","modified_at":"2026-10-16T21:20:02.887Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-102692","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T21:20:02.887Z"},{"source":"GitHub Advisory Database","url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-8365-gj33-rgpf","fetched_at":"2026-10-23T20:00:35.122048Z","source_modified_at":"2026-09-29T17:22:29Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-102692","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-8365-gj33-rgpf","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/commit/6b283ace3565d931b3edff7e115d4f79339253b8","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/commit/ee1fa0ef91874494823d476392572aeefdbc6b74","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/releases/tag/2026.07","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-16T20:52:34.763359Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T21:20:02.887Z","content_hash":"78fd2201a7e25b61b85c974d2c23c5eafc9f3d3089b918f9d3260e10a6c5f790"}}