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

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products3

• Red Hat Hardened Images
• python-idna-main@noarch as a component of Red Hat Hardened Images
• python-idna-main@src 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 denial-of-service vulnerability, applications utilizing the `idna` Python library should implement input validation to ensure that domain names do not exceed the standard 253-character length limit before being passed to the `idna.encode()` function. This operational control prevents the processing of excessively long inputs that could lead to resource exhaustion and service unavailability. Applications that pass user-controlled data directly to `idna.encode()` without validation checks (e.g.: DNS length < 254 chars) are affected.

🔗 References (5)

• selfhttps://access.redhat.com/errata/RHSA-2026:25503
• externalhttps://images.redhat.com/
• externalhttps://access.redhat.com/security/cve/CVE-2026-45409
• externalhttps://access.redhat.com/security/updates/classification/
• selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25503.json