CVE-2026-107837 (GCVE-0-2026-107837)

Vulnerability from cvelistv5 – Published: 2026-10-09 17:53 – Updated: 2026-10-09 17:53
VLAI
Title
RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handling
Summary
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.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7642 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
RIOT-OS RIOT Affected: <= 2026.07
guessed Create a notification for this product.
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{
  "containers": {
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          "vendor": "RIOT-OS",
          "versions": [
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        }
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              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
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      "providerMetadata": {
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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        }
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      "source": {
        "advisory": "GHSA-m8mc-q4p7-p8j3",
        "discovery": "UNKNOWN"
      },
      "title": "RIOT: Out-of-Bounds Read in RIOT OS 6LoWPAN SFF Fragment Handling"
    }
  },
  "cveMetadata": {
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    "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"
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          }
        ],
        "id": "CVE-2026-107837",
        "lastModified": "2026-10-09T18:17:05.483",
        "metrics": {
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        "vulnStatus": "Received",
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            ],
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            "type": "Primary"
          }
        ]
      }
    }
  }
}



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