CVE-2025-8556

Summary

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.

Affected Software

Weaknesses

• CWE-1287: Improper Validation of Specified Type of Input

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

CVE Program Container

Additional References

• https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation
• https://news.ycombinator.com/item?id=45669593

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

• ←Previous
• Next→