| Name | CVE-2025-8556 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| golang-github-cloudflare-circl (PTS) | bullseye | 1.0.0+20200724-1 | vulnerable |
| bookworm | 1.3.1-2 | vulnerable |
| trixie | 1.6.1-1 | fixed |
| forky, sid | 1.6.3-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - golang-github-cloudflare-circl <no-dsa> (Minor issue)
[bullseye] - golang-github-cloudflare-circl <postponed> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2371624
https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm