CVE-2026-25139— RIOT Vulnerable to Multiple Out-of-Bounds Read When Processing Received 6LoWPAN SFR Fragments
Quick assessment
Affected
RIOT-OS RIOT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
RIOT是RIOT开源的一套应用于物联网领域的操作系统。 RIOT 2025.10及之前版本存在缓冲区错误漏洞，该漏洞源于多个越界读取漏洞，可能导致读取相邻内存位置或设备崩溃。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-25139
Vulnerability Information
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Vulnerability Title
RIOT Vulnerable to Multiple Out-of-Bounds Read When Processing Received 6LoWPAN SFR Fragments
Source: CVE Program / CVE List V5
Vulnerability Description
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. In version 2025.10 and prior, multiple out-of-bounds read allow any unauthenticated user, with ability to send or manipulate input packets, to read adjacent memory locations, or crash a vulnerable device running the 6LoWPAN stack. The received packet is cast into a sixlowpan_sfr_rfrag_t struct and dereferenced without validating the packet is large enough to contain the struct object. At time of publication, no known patch exists.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
RIOT 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RIOT是RIOT开源的一套应用于物联网领域的操作系统。 RIOT 2025.10及之前版本存在缓冲区错误漏洞，该漏洞源于多个越界读取漏洞，可能导致读取相邻内存位置或设备崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-25139
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IV. Related Vulnerabilities
Same product: RIOT
-
CVE-2026-27703
RIOT has an Out-of-Bounds Write in nanoCoAP Handler -
CVE-2025-66647
RIOT OS has buffer overflow in gnrc_ipv6_ext_frag_reass -
CVE-2025-66646
RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_r -
CVE-2025-53888
RIOT-OS has an ineffective size check that can lead to buffe -
CVE-2024-53980
Spoofed length byte traps CC2538 in endless loop
Same vendor: RIOT-OS
-
CVE-2026-27703
RIOT has an Out-of-Bounds Write in nanoCoAP Handler -
CVE-2025-66647
RIOT OS has buffer overflow in gnrc_ipv6_ext_frag_reass -
CVE-2025-66646
RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_r -
CVE-2025-53888
RIOT-OS has an ineffective size check that can lead to buffe -
CVE-2024-53980
Spoofed length byte traps CC2538 in endless loop
Same weakness: CWE-125
-
CVE-2026-107302
msgpack5: Truncated map32 headers throw an unexpected error -
CVE-2026-107634
Dislocker through 0.7.3 Heap Out-of-Bounds Read via BitLocke -
CVE-2026-14496
IBM DataPower Gateway Out-of-bounds Read -
CVE-2026-14988
IBM DataPower Gateway Out-of-bounds Read -
CVE-2026-107611
Out-of-bounds read in TightVNC Viewer ZRLE palette decoding
V. Comments for CVE-2026-25139
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