CVE-2025-8556

Github.com/cloudflare/circl: circl-fourq: missing and wrong validation can lead to incorrect results

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.

Remediation

Workaround:

  • 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.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Builds for Red Hat OpenShift
Affected: Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
Affected: Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
Affected: Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
Affected: Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
Affected: Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
Affected: Red Hat Multicluster Global Hub
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Pipelines
Affected: Red Hat OpenShift Serverless
Affected: Red Hat OpenShift Serverless
Affected: Red Hat OpenShift Serverless
Affected: Red Hat OpenShift Serverless
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat OpenShift Service Mesh 3
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Advanced Cluster Security 4
Affected: Red Hat Red Hat Ceph Storage 5
Affected: Red Hat Red Hat Ceph Storage 5
Affected: Red Hat Red Hat Ceph Storage 6
Affected: Red Hat Red Hat Ceph Storage 6
Affected: Red Hat Red Hat Ceph Storage 8
Affected: Red Hat Red Hat Ceph Storage 8
Affected: Red Hat Red Hat Developer Hub
Affected: Red Hat Red Hat Developer Hub
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat Enterprise Linux AI (RHEL AI)
Affected: Red Hat Red Hat OpenShift AI (RHOAI)
Affected: Red Hat Red Hat OpenShift AI (RHOAI)
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Container Platform 4
Affected: Red Hat Red Hat OpenShift Dev Workspaces Operator
Affected: Red Hat Red Hat OpenShift Dev Workspaces Operator
Affected: Red Hat Red Hat OpenShift Dev Workspaces Operator
Affected: Red Hat Red Hat OpenShift for Windows Containers
Affected: Red Hat Red Hat OpenShift for Windows Containers
Affected: Red Hat Red Hat OpenShift GitOps
Affected: Red Hat Red Hat OpenShift GitOps
Affected: Red Hat Red Hat OpenShift GitOps
Affected: Red Hat Red Hat OpenShift GitOps
Affected: Red Hat Red Hat OpenShift Virtualization 4
Affected: Red Hat Red Hat OpenStack Platform 16.2
Affected: Red Hat Red Hat OpenStack Platform 16.2
Affected: Red Hat Red Hat OpenStack Platform 16.2
Affected: Red Hat Red Hat OpenStack Platform 17.1
Affected: Red Hat Red Hat OpenStack Platform 17.1
Affected: Red Hat Red Hat OpenStack Platform 17.1
Affected: Red Hat Red Hat Trusted Application Pipeline
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Artifact Signer
Affected: Red Hat Red Hat Trusted Profile Analyzer
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2025-8556 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2371624 issue tracking
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

Frequently Asked Questions

What is the severity of CVE-2025-8556?
CVE-2025-8556 has been scored as a low severity vulnerability.
How to fix CVE-2025-8556?
As a workaround for remediating CVE-2025-8556: 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.
Is CVE-2025-8556 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-8556 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-8556?
CVE-2025-8556 affects Red Hat Builds for Red Hat OpenShift, Red Hat Builds for Red Hat OpenShift, Red Hat Builds for Red Hat OpenShift, Red Hat Builds for Red Hat OpenShift, Red Hat Builds for Red Hat OpenShift, Red Hat Builds for Red Hat OpenShift, Red Hat Custom Metric Autoscaler operator for Red Hat Openshift, Red Hat Custom Metric Autoscaler operator for Red Hat Openshift, Red Hat Custom Metric Autoscaler operator for Red Hat Openshift, Red Hat Custom Metric Autoscaler operator for Red Hat Openshift, Red Hat Custom Metric Autoscaler operator for Red Hat Openshift, Red Hat Multicluster Global Hub, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat OpenShift Pipelines, Red Hat 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