RHSA-2026:7224HighCVSS 8.1
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
🔗 CVE IDs covered (2)
📋 Description
CVE-2026-27448 — pyOpenSSL: TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback CVE-2026-27459 — pyOpenSSL: DTLS cookie callback buffer overflow
🎯 Affected products3
- Red Hat Hardened Images
- pyopenssl-main@noarch as a component of Red Hat Hardened Images
- pyopenssl-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 flaw, ensure the callback provided to the set_tlsext_servername_callback function is wrapped in a try/except block. This block should explicitly return a failure code instead of allowing the exception to propagate. Workaround: To mitigate this flaw, ensure the callback provided to the set_cookie_generate_callback function strictly limits the returned cookie string or byte sequence to under 256 bytes.
🔗 References (6)
- selfhttps://access.redhat.com/errata/RHSA-2026:7224
- externalhttps://images.redhat.com/
- externalhttps://access.redhat.com/security/cve/CVE-2026-27459
- externalhttps://access.redhat.com/security/updates/classification/
- externalhttps://access.redhat.com/security/cve/CVE-2026-27448
- selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_7224.json