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Microsoft Security Response CenterCVE-2026-56855

Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

MediumVendor CVSS 7.5 / 10 1 CVE Published Sep 7, 2026 at 2:00 AM UTC
Get alerts for azl3 kubevirt 1.7.1-8 on Azure Linux

Summary

Mariner

Products covered

  • azl3 kubevirt 1.7.1-8 on Azure Linux 3.0

  • azl3 packer 1.9.5-18 on Azure Linux 3.0

  • azl3 cf-cli 8.7.11-9 on Azure Linux 3.0

  • azl3 docker-buildx 0.14.0-17 on Azure Linux 3.0

  • azl3 docker-compose 2.27.0-14 on Azure Linux 3.0

  • azl3 kubernetes 1.30.10-30 on Azure Linux 3.0

  • azl3 kubevirt 1.8.4-2 on Azure Linux 3.0

  • azl3 cert-manager 1.12.15-11 on Azure Linux 3.0

Show 15 more products

  • azl3 cf-cli 8.7.11-8 on Azure Linux 3.0

  • azl3 docker-buildx 0.14.0-16 on Azure Linux 3.0

  • azl3 docker-compose 2.27.0-13 on Azure Linux 3.0

  • azl3 gh 2.62.0-20 on Azure Linux 3.0

  • azl3 kubernetes 1.30.10-27 on Azure Linux 3.0

  • azl3 moby-engine 25.0.3-19 on Azure Linux 3.0

  • azl3 telegraf 1.31.0-28 on Azure Linux 3.0

  • azl3 cert-manager 1.12.15-12 on Azure Linux 3.0

  • azl3 gh 2.98.0-1 on Azure Linux 3.0

  • azl3 kubernetes 1.30.10-29 on Azure Linux 3.0

  • azl3 kubevirt 1.8.4-1 on Azure Linux 3.0

  • azl3 moby-engine 25.0.3-20 on Azure Linux 3.0

  • azl3 packer 1.9.5-20 on Azure Linux 3.0

  • azl3 telegraf 1.31.0-31 on Azure Linux 3.0

  • azl3 packer 1.9.5-21 on Azure Linux 3.0

Remediation

Release Notes

Vendor-listed fixes

  • 8.7.11-9

  • 0.14.0-17

  • 2.27.0-14

  • 1.30.10-30

  • 1.8.4-2

  • 1.12.15-14

  • 2.101.0-1

  • 25.0.3-21

Show 2 more fixes

  • 1.9.5-21

  • 1.31.0-33

CVEs in this advisory 1

CVE-2026-56855
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory's last-updated date.
    • The vendor changed the advisory's last-updated date.
    • Added fixed versions: 25.0.3-21.
    • The vendor changed the advisory's last-updated date.
    • Added affected products: azl3 cf-cli 8.7.11-9 on Azure Linux 3.0, azl3 docker-buildx 0.14.0-17 on Azure Linux 3.0, azl3 docker-compose 2.27.0-14 on Azure Linux 3.0, azl3 kubernetes 1.30.10-30 on Azure Linux 3.0, azl3 kubevirt 1.8.4-2 on Azure....
    • Added fixed versions: 1.12.15-14, 1.31.0-33, 2.101.0-1.
    • Removed fixed versions: 1.12.15-13, 1.31.0-32, 2.98.0-2.
    • The vendor changed its remediation guidance.
    • Added fixed versions: 0.14.0-17, 1.8.4-2, 1.9.5-21, 1.12.15-13, 1.30.10-30.
    • Added affected products: azl3 cert-manager 1.12.15-12 on Azure Linux 3.0, azl3 gh 2.98.0-1 on Azure Linux 3.0, azl3 kubernetes 1.30.10-29 on Azure Linux 3.0, azl3 kubevirt 1.8.4-1 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0.
    • Removed affected products: azl3 libcontainers-common 20240213-3 on Azure Linux 3.0, azl3 nvidia-container-toolkit 1.17.8-4 on Azure Linux 3.0.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

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