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4 vulnerabilities found for RIOT by RIOT-OS

CVE-2025-66647 (GCVE-0-2025-66647)
Vulnerability from nvd
Published
2025-12-17 20:21
Modified
2025-12-17 20:39
Severity ?
1.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Summary
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When copying the contents of the first fragment (offset=0) into the reassembly buffer, no size check is performed. It is possible to force the creation of a small reassembly buffer by first sending a shorter fragment (also with offset=0). Overflowing the reassembly buffer corrupts the state of other packet buffers which an attacker might be able to used to achieve further memory corruption (potentially resulting in remote code execution). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be included and the attacker must be able to send arbitrary IPv6 packets to the victim. Version 2025.10 fixes the issue.
References
Impacted products
Vendor Product Version
RIOT-OS RIOT Version: < 2025.10
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2025-66646 (GCVE-0-2025-66646)
Vulnerability from nvd
Published
2025-12-17 19:18
Modified
2025-12-17 20:30
Severity ?
1.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When receiving an fragmented IPv6 packet with fragment offset 0 and an empty payload, the payload pointer is set to NULL. However, the implementation still tries to copy the payload into the reassembly buffer, resulting in a NULL pointer dereference which crashes the OS (DoS). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be enabled and the attacker must be able to send arbitrary IPv6 packets to the victim. RIOT OS v2025.10 fixes the issue.
References
Impacted products
Vendor Product Version
RIOT-OS RIOT Version: < 2025.10
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2025-66647 (GCVE-0-2025-66647)
Vulnerability from cvelistv5
Published
2025-12-17 20:21
Modified
2025-12-17 20:39
Severity ?
1.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Summary
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When copying the contents of the first fragment (offset=0) into the reassembly buffer, no size check is performed. It is possible to force the creation of a small reassembly buffer by first sending a shorter fragment (also with offset=0). Overflowing the reassembly buffer corrupts the state of other packet buffers which an attacker might be able to used to achieve further memory corruption (potentially resulting in remote code execution). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be included and the attacker must be able to send arbitrary IPv6 packets to the victim. Version 2025.10 fixes the issue.
References
Impacted products
Vendor Product Version
RIOT-OS RIOT Version: < 2025.10
 Create a notification for this product.
Show details on NVD website

To clipboard 

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          "tags": [
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          "name": "https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c#L544",
          "tags": [
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          "url": "https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c#L544"
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          "url": "https://github.com/RIOT-OS/RIOT/releases/tag/2025.10"
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      "source": {
        "advisory": "GHSA-wh3v-q6vr-j79r",
        "discovery": "UNKNOWN"
      },
      "title": "RIOT OS has buffer overflow in gnrc_ipv6_ext_frag_reass"
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-66647",
    "datePublished": "2025-12-17T20:21:13.264Z",
    "dateReserved": "2025-12-05T20:23:19.596Z",
    "dateUpdated": "2025-12-17T20:39:34.238Z",
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CVE-2025-66646 (GCVE-0-2025-66646)
Vulnerability from cvelistv5
Published
2025-12-17 19:18
Modified
2025-12-17 20:30
Severity ?
1.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When receiving an fragmented IPv6 packet with fragment offset 0 and an empty payload, the payload pointer is set to NULL. However, the implementation still tries to copy the payload into the reassembly buffer, resulting in a NULL pointer dereference which crashes the OS (DoS). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be enabled and the attacker must be able to send arbitrary IPv6 packets to the victim. RIOT OS v2025.10 fixes the issue.
References
Impacted products
Vendor Product Version
RIOT-OS RIOT Version: < 2025.10
 Create a notification for this product.
Show details on NVD website

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