RHSA-2026:29950MediumCVSS 7.1

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published
June 25, 2026
Last Modified
August 24, 2026

🔗 CVE IDs covered (2)

CVE-2026-55200 →CVE-2026-55199 →

📋 Description

CVE-2026-55199 — libssh2: libssh2: Denial of Service via crafted SSH_MSG_EXT_INFO message CVE-2026-55200 — libssh2: libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

🎯 Affected products5

  • Red Hat Hardened Images
  • libssh2-main@aarch64 as a component of Red Hat Hardened Images
  • libssh2-main@noarch as a component of Red Hat Hardened Images
  • libssh2-main@src as a component of Red Hat Hardened Images
  • libssh2-main@x86_64 as a component of Red Hat Hardened Images

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Workaround: To mitigate this issue, ensure your libssh2 clients only connect to trusted SSH servers. You can enforce this by implementing outbound network access controls (egress filtering) to block applications from initiating connections to unknown or untrusted external hosts. Workaround: The primary mitigation is strict network access control. Ensure libssh2 clients only connect to trusted SSH servers, and use firewalls to block untrusted incoming connections if libssh2 is deployed as a server-side application.

🔗 References (6)