{"api_version":"1","generated_at":"2026-10-09T21:33:03+00:00","cve":"CVE-2026-107837","urls":{"html":"https://cve.report/CVE-2026-107837","api":"https://cve.report/api/cve/CVE-2026-107837.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-107837","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107837"},"summary":{"title":"RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handling","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-09 18:17:05","updated_at":"2026-10-09 18:17:05"},"problem_types":["CWE-125","CWE-125 CWE-125: Out-of-bounds Read"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"8.2","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.2","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d","name":"https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3","name":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/RIOT-OS/RIOT/pull/22504","name":"https://github.com/RIOT-OS/RIOT/pull/22504","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107837","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107837","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"RIOT-OS","product":"RIOT","version":"affected <= 2026.07","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"RIOT","vendor":"RIOT-OS","versions":[{"status":"affected","version":"<= 2026.07"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-09T17:53:47.707Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3"},{"name":"https://github.com/RIOT-OS/RIOT/pull/22504","tags":["x_refsource_MISC"],"url":"https://github.com/RIOT-OS/RIOT/pull/22504"},{"name":"https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d","tags":["x_refsource_MISC"],"url":"https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d"}],"source":{"advisory":"GHSA-m8mc-q4p7-p8j3","discovery":"UNKNOWN"},"title":"RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handling"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-107837","datePublished":"2026-10-09T17:53:47.707Z","dateReserved":"2026-10-08T22:34:49.289Z","dateUpdated":"2026-10-09T17:53:47.707Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-09 18:17:05","lastModifiedDate":"2026-10-09 18:17:05","problem_types":["CWE-125","CWE-125 CWE-125: Out-of-bounds Read"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"107837","Ordinal":"1","Title":"RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handlin","CVE":"CVE-2026-107837","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"107837","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handlin"}]}}}