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CVE record · CVE-2025-66646

RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass

CVSS 1.7 LowEPSS 0.0068 · 52nd percentile

Published by the CVE Program (CNA: GitHub_M) at 17 Dec 2025, 19:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
RIOT-OS RIOT
  • affected < 2025.10
Identifiers
CVE-2025-66646
CNA
GitHub_M
Weakness (CWE)
CWE-476
Tags
Published
17 Dec 2025
Updated
17 Dec 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
1.7 Low 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0068, the 52nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Dec 2025. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.