CVE-2025-8556 – CIRCL FourQ Elliptic Curve Diffie-Hellman Key Exchange Session Compromise

The following table lists the changes that have been made to the
CVE-2025-8556 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Aug. 06, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
    Added CWE CWE-347
    Added Reference https://access.redhat.com/security/cve/CVE-2025-8556
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2371624
    Added Reference https://github.com/cloudflare/circl
    Added Reference https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm
    Added Reference https://github.com/cloudflare/circl/tree/v1.6.1
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