High8.1Red Hat Linux

High [CVE-2026-27459] DTLS cookie callback buffer overflow

This high-severity Red Hat Linux advisory covers CVE-2026-27459 affecting Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 9.

CVE-2026-27459 Published Mar 17, 2026

CVE-2026-27459

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

DTLS cookie callback buffer overflow. Red Hat rates this important (CVSS 8.1).

Weakness: CWE-120. Affected package(s): pyopenssl-main, ansible-automation-platform, python3.12-pyOpenSSL, quay/quay-rhel8:1776752646, automation-controller, python-pyOpenSSL.

Resolved in Red Hat advisory RHSA-2026:11916 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Ansible Automation Platform 2.5 for RHEL 8; Red Hat Ansible Automation Platform 2.5 for RHEL 9; Red Hat Ansible Automation Platform 2.6 for RHEL 9; Red Hat Satellite 6.16 for RHEL 8; and 23 more.

Affected versions

pyopenssl-main-26.0.0-1.1.hum1
ansible-automation-platform-25/ee-supported-rhel8:1777398315
ansible-automation-platform-26/lightspeed-rhel9:1777387242
python3.12-pyOpenSSL-0:26.0.0-2.el9pc
quay/quay-rhel8:1776752646
ansible-automation-platform-26/hub-rhel9:1777299023
automation-controller-0:4.7.11-2.el9ap
ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240
python-pyOpenSSL-0:24.1.0-2.el8ui
quay/quay-rhel8:1780891395
ansible-automation-platform-26/eda-controller-rhel9:1777296732
quay/quay-rhel9:1779922205

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:11916

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:11916 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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