Vulnerability Description
A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2025-8556
- https://bugzilla.redhat.com/show_bug.cgi?id=2371624
- https://github.com/cloudflare/circl
- https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm
- https://github.com/cloudflare/circl/tree/v1.6.1
- https://news.ycombinator.com/item?id=45669593
- https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fou
FAQ
What is CVE-2025-8556?
CVE-2025-8556 is a vulnerability with a CVSS score of 3.7 (LOW). A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validatio...
How severe is CVE-2025-8556?
CVE-2025-8556 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-8556?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.