OpenSSL Silently Fixes ‘HollowByte’ DoS Vulnerability

SecurityWeek

July 20, 2026 at 12:32 PM

Overview

OpenSSL has addressed a vulnerability known as 'HollowByte' that could allow attackers to launch denial-of-service (DoS) attacks. By sending specially crafted payloads, attackers could exploit the way memory is allocated by the software, potentially leading to server memory exhaustion. This issue affects any systems that utilize OpenSSL for secure communications, which includes a wide range of web servers and applications. The risk is significant because it could lead to service outages for affected systems. Users and administrators are advised to update their OpenSSL versions to mitigate this vulnerability and ensure continued security.

Key Takeaways

Affected Systems: OpenSSL versions that handle secure communications.
Action Required: Users should update to the latest version of OpenSSL to patch the vulnerability.
Timeline: Disclosed on October 2023

Original Article Summary

Attackers could send waves of malicious payloads to trigger buffer pre-allocations that are not freed, exhausting server memory. The post OpenSSL Silently Fixes ‘HollowByte’ DoS Vulnerability appeared first on SecurityWeek.

Impact

OpenSSL versions that handle secure communications.

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on October 2023

Remediation

Users should update to the latest version of OpenSSL to patch the vulnerability.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Exploit, Vulnerability, Update.

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