CVE-2026-49868

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Source
https://cve.org/CVERecord?id=CVE-2026-49868
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49868.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49868
Aliases
  • GHSA-p3fx-9qcg-jmcf
Published
2026-10-16T16:50:58Z
Modified
2026-10-17T02:48:28Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
RIOT: DHCPv6 client _parse_reply() missing sub-option length check leads to size_t underflow and unbounded OOB heap read
Details

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, _parse_reply() in sys/net/application_layer/dhcpv6/client.c omits minimum-length validation before passing IA_PD and IA_NA option bodies to sub-option parsers. A malicious or compromised DHCPv6 server can send a REPLY with an option length smaller than the required structure while MODULE_DHCPV6_CLIENT_IA_PD is enabled, causing _parse_ia_pd_option to read past the option body, size_t underflow, and unbounded out-of-bounds heap reads that can crash the device and may expose or corrupt memory. This issue is fixed in version 2026.07.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-125",
        "CWE-191"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49868.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
a897b0498f635654f091bf9f33e9696aa773e886
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2026.07"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

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-devel

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49868.json"