PT-2025-32144 · Circl+2 · Circl+2

Alon Livne · Published 2025-01-01 · Updated 2026-02-25 · CVE-2025-8556

Positive Technologies (AI Summary)

CVSS v3.1

3.7

Low

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions CIRCL (affected versions not specified)

Description A flaw exists in CIRCL’s implementation of the FourQ elliptic curve. This issue allows an attacker to compromise session security through low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Verification of Cryptographic Signature

RCE

Weakness Enumeration

CWE-347

CWE-20

CWE-1287

Related Identifiers

CVE-2025-8556

ECHO-6134-C525-36A8

GHSA-2X5J-VHC8-9CWM

GHSA-522R-9946-FW43

GO-2025-3754

OPENSUSE-SU-2026:10013-1

OPENSUSE-SU-2026:20730-1

SUSE-SU-2026:0439-1

Affected Products

Circl

Debian

Red Os

References · 50

• https://osv.dev/vulnerability/UBUNTU-CVE-2025-8556 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-2x5j-vhc8-9cwm · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0439-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10013-1 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-522r-9946-fw43 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-8556 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-8556 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-3754 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-8556 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-8556 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-8556 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-8556 · Vendor Advisory
• https://github.com/cloudflare/circl · Note
• https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm · Note
• https://github.com/cloudflare/circl/tree/v1.6.1 · Note