{"schema":"threatline.record/2","record":{"id":"CVE-2026-107837","aliases":["GHSA-m8mc-q4p7-p8j3"],"summary":"RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handling","details":"RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, _receive() in sys/net/gnrc/network_layer/sixlowpan/gnrc_sixlowpan.c can route an undersized packet into SFF fragment handling after only a minimal payload check. The code then interprets the packet as a sixlowpan_frag_t or larger fragment header without verifying that the packet snip contains the required bytes. A remote attacker can send a malformed 6LoWPAN fragment that causes gnrc_sixlowpan_frag_recv() to read beyond the packet buffer, potentially disclosing memory and crashing the network stack. No fixed repository release is available as of this review.","categories":["Unclassified"],"product":"RIOT","vendor":"RIOT-OS","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107837","source_modified_at":"2026-10-13T20:26:34.327Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"RIOT","vendor":"RIOT-OS","versions":[{"version":"<= 2026.07","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00378,"percentile":0.30555,"score_date":"2026-10-23"},"published_at":"2026-10-09T17:53:47.707Z","modified_at":"2026-10-13T20:26:34.327Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-107837","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T20:26:34.327Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107837","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/pull/22504","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d","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":"2026-10-13T20:19:09.942133Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T20:26:34.327Z","content_hash":"96e02ef7b3b5c91b1440a6e2ead2a1eff8b605ca2d7f9d8b792dbc0ac70d40d7"}}