CVE-2026-107837

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Source
https://cve.org/CVERecord?id=CVE-2026-107837
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107837.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-107837
Aliases
  • GHSA-m8mc-q4p7-p8j3
Published
2026-10-09T17:53:47Z
Modified
2026-10-11T07:04:25Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107837.json"
}
References

Affected packages

Git / github.com/riot-os/riot

Affected ranges

Type
GIT
Repo
https://github.com/riot-os/riot
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0cae205cd1d110e0b8fce094714598322d56ce2d
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2026.07"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2013.*
2013.08
2014.*
2014.01
2014.05
2014.12
2015.*
2015.09-RC1
2015.12-RC1
2015.12-devel
2016.*
2016.03-devel
2016.04-RC1
2016.07-RC1
2016.07-RC2
2016.07-devel
2016.10-RC1
2016.10-devel
2017.*
2017.01-RC1
2017.01-devel
2017.04-RC1
2017.04-devel
2017.07-RC1
2017.07-devel
2017.10-RC1
2017.10-devel
2018.*
2018.01-RC1
2018.01-devel
2018.04-RC1
2018.04-devel
2018.07-RC1
2018.07-devel
2018.10-RC1
2018.10-devel
2019.*
2019.01-RC1
2019.01-devel
2019.04-RC1
2019.04-devel
2019.07-RC1
2019.07-devel
2019.10-RC1
2019.10-devel
2020.*
2020.01-RC1
2020.01-devel
2020.04-RC1
2020.04-devel
2020.07-RC1
2020.07-devel
2020.10-RC1
2020.10-devel
2021.*
2021.01-RC1
2021.01-devel
2021.04-RC1
2021.04-devel
2021.07-RC1
2021.07-devel
2021.10-RC1
2021.10-devel
2022.*
2022.01-RC1
2022.01-devel
2022.04-RC1
2022.04-devel
2022.07-RC1
2022.07-devel
2022.10-RC1
2022.10-devel
2023.*
2023.01-RC1
2023.01-devel
2023.04-RC1
2023.04-devel
2023.07-RC1
2023.07-devel
2023.10-RC1
2023.10-devel
2024.*
2024.01-RC1
2024.01-devel
2024.04
2024.04-RC1
2024.04-devel
2024.07-RC1
2024.07-devel
2024.10-RC1
2024.10-devel
2025.*
2025.01-RC1
2025.01-devel
2025.04-RC1
2025.04-devel
2025.07-RC1
2025.07-devel
2025.10-RC1
2025.10-devel
2026.*
2026.01-RC1
2026.01-devel
2026.04-RC1
2026.04-devel
2026.07-RC1
2026.07-devel
2026.10-devel

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107837.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "28425923961457656207872185579105990781",
                "120241915219534454861488486735082384643",
                "79928265154049323980788402254745912523",
                "74450740251760192143420873985435767725"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-107837-16232dad",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/riot-os/riot/commit/0cae205cd1d110e0b8fce094714598322d56ce2d",
        "target": {
            "file": "sys/net/gnrc/network_layer/sixlowpan/gnrc_sixlowpan.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "273274595696210877300947620346216307940",
            "length": 1959
        },
        "id": "CVE-2026-107837-46102004",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/riot-os/riot/commit/0cae205cd1d110e0b8fce094714598322d56ce2d",
        "target": {
            "file": "sys/net/gnrc/network_layer/sixlowpan/gnrc_sixlowpan.c",
            "function": "_receive"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "157616998904770304068523081400192147262",
                "125091049534551526924999141310772826721",
                "85452627459648544223717132772677482670"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-107837-881f999f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/riot-os/riot/commit/0cae205cd1d110e0b8fce094714598322d56ce2d",
        "target": {
            "file": "sys/include/net/gnrc/sixlowpan.h"
        }
    }
]
vanir_signatures_modified 
"2026-10-11T07:04:25Z"