Pre-Auth RCE Risk: OpenSSL Patches High-Severity Stack Overflow (CVE-2025-15467)

**OpenSSL security update addressing multiple vulnerabilities:** The advisory details a high-severity stack buffer overflow in CMS AuthEnvelopedData processing (CVE-2025-15467) that can be triggered without authentication and may allow remote code execution or denial-of-service, a moderate PKCS#12 PBMAC1 validation issue (CVE-2025-11187), and several low-severity flaws; maintainers provide specific patched OpenSSL versions for affected branches.