CVE-2025-23019

Impact

IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• https://datatracker.ietf.org/doc/html/rfc4213
• https://papers.mathyvanhoef.com/usenix2025-tunnels.pdf
• https://www.top10vpn.com/research/tunneling-protocol-vulnerability/
• https://www.kb.cert.org/vuls/id/199397