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Hackers Target OpenSSH SSHole Flaw Within Hours of Disclosure, Gain Root on Honeypot

The Hacker News
Actively Exploited
LinuxCVEExploitVulnerability

Overview

A newly disclosed security vulnerability in OpenSSH, identified as CVE-2026-123158 and dubbed SSHole, is being actively targeted by cybercriminals. This flaw affects Linux systems running OpenSSH with the musl C library and where Pluggable Authentication Modules (PAM) are disabled. The vulnerability allows unauthorized sign-ins to accounts that do not have passwords set, which poses a significant risk to users and organizations relying on this software. Researchers have reported that attackers are attempting to exploit this flaw within hours of its announcement, successfully gaining root access on a honeypot system. The urgency of addressing this vulnerability cannot be overstated, as it opens the door for potential intrusions and data breaches in affected environments.

Key Takeaways

  • Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
  • Affected Systems: OpenSSH on Linux systems using the musl C library with PAM disabled.
  • Action Required: Users are advised to enable Pluggable Authentication Modules (PAM) if not already configured.
  • Timeline: Newly disclosed

Original Article Summary

Threat actors are attempting to exploit a recently disclosed security flaw impacting OpenSSH that can enable sign-ins to accounts that have no password set, according to Previdian. The vulnerability, tracked as CVE-2026-123158 (CVSS score: 8.1) and codenamed SSHole (or *sshole), impacts Linux systems that run OpenSSH on the musl C library with Pluggable Authentication Modules (PAM) disabled,

Impact

OpenSSH on Linux systems using the musl C library with PAM disabled.

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users are advised to enable Pluggable Authentication Modules (PAM) if not already configured. Additionally, applying security updates and patches as they become available is recommended to mitigate the risk of exploitation.

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 Linux, CVE, Exploit, and 1 more.

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