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CVE-2025-66646 RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass

🗓️ 17 Dec 2025 19:18:08Reported by GoogleType 
osv
 osv🔗 osv.dev👁 1 Views

RIOT OS IPv6 reassembly dereferences NULL payload at zero offset, causing DoS; fixed in 2025.10.

Related
Refs
ReporterTitlePublishedViews
Family
CNNVD		RIOT 代码问题漏洞
17 Dec 202500:00
–cnnvd
CVE		CVE-2025-66646
17 Dec 202519:18
–cve
Cvelist		CVE-2025-66646 RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass
17 Dec 202519:18
–cvelist
EUVD		EUVD-2025-203929
17 Dec 202519:18
–euvd
NVD		CVE-2025-66646
17 Dec 202520:15
–nvd
Positive Technologies		PT-2025-51877
17 Dec 202500:00
–ptsecurity
RedhatCVE		CVE-2025-66646
18 Dec 202519:44
–redhatcve
Vulnrichment		CVE-2025-66646 RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass
17 Dec 202519:18
–vulnrichment
SourceLink
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
githubwww.github.com/RIOT-OS/RIOT/blob/eb65305cf9f1b7affb50b17af5c12341b83a8636/sys/net/gnrc/pktbuf_static/gnrc_pktbuf_static.c
githubwww.github.com/RIOT-OS/RIOT/releases/tag/2025.10
githubwww.github.com/user-attachments/files/23903992/reproducer_1.zip
githubwww.github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66646.json
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10 Apr 2026 05:34Current
6.9Medium risk
Vulners AI Score6.9
CVSS 46.3
EPSS0.00281
Null pointerIPv6 fragmentationRiot OSDenial of serviceFragment reassembly
1