RHSA-2026:54400HighCVSS 8.1

Red Hat Security Advisory: VolSync v0.15 security fixes and container updates

Published
August 12, 2026
Last Modified
August 20, 2026

🔗 CVE IDs covered (5)

CVE-2026-39830 →CVE-2026-39831 →CVE-2026-42508 →CVE-2026-46597 →CVE-2026-39829 →

📋 Description

CVE-2026-39829 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters CVE-2026-39830 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses CVE-2026-39831 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Security key bypass due to missing user presence check CVE-2026-42508 — golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey CVE-2026-46597 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted AES-GCM packet decoder inputs

🎯 Affected products6

  • Red Hat Advanced Cluster Management for Kubernetes 2.16
  • registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:29848647ba1965c23a770975538c66974406466a4d4c64c930d2ac911b5bd93f_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16
  • registry.redhat.io/rhacm2/volsync-rhel9@sha256:8cc7331a2b17bd12746e860d38443f43e95ec77a8ce6bedb892f6e9ae57adf39_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16
  • registry.redhat.io/rhacm2/volsync-rhel9@sha256:c3f585f0b53eaa91b6d615b3fdbb001f65117f7685e438652b2d2f7d6a1759a7_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16
  • registry.redhat.io/rhacm2/volsync-rhel9@sha256:e7287730240e2f291f9a288b1c6303cf316ba486996b9c0c86994a8b65207e32_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16
  • registry.redhat.io/rhacm2/volsync-rhel9@sha256:ebe5b27219964ba01299499baa1a5d237c976018df7c370ddacc7b0c53ccb6d0_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16

✅ Remediation

For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.16/html/business_continuity/business-cont-overview#volsync 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. Workaround: To mitigate this denial of service vulnerability, restrict network access to any service that utilizes the `golang.org/x/crypto/ssh` library and is exposed to untrusted networks. Implement firewall rules to allow connections only from trusted hosts or networks. This action limits the ability of malicious peers to send unsolicited global request responses. A restart of the affected service may be necessary for the new network rules to be applied effectively.

🔗 References (8)