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

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products4

• Red Hat Hardened Images
• libidn2-main@aarch64 as a component of Red Hat Hardened Images
• libidn2-main@src as a component of Red Hat Hardened Images
• libidn2-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: No configuration-level mitigation is available; triggering the incorrect result depends on uninitialized stack content from earlier processing, so behavior is non-deterministic and cannot be reliably suppressed via input filtering. Users should update to a fixed libidn package once available. Applications that must process untrusted internationalized domain names before a fix is available should treat output of idna_to_unicode_8z8z()/idna_to_unicode_8zlz() as unverified, perform an independent comparison against the original ACE-encoded input, or use libidn2 for IDNA processing, which is not affected.

🔗 References (5)

• selfhttps://access.redhat.com/errata/RHSA-2026:42125
• externalhttps://images.redhat.com/
• externalhttps://access.redhat.com/security/cve/CVE-2026-57053
• externalhttps://access.redhat.com/security/updates/classification/
• selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_42125.json