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Cyber Security
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Thehackingpost
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PoC Exploit Released for Linux-PAM Vulnerability Allowing Root Privilege Escalation

An identified vulnerability in the Pluggable Authentication Modules (PAM) framework, designated as CVE-2025-8941, has been classified as high severity. This issue allows attackers with local access to exploit symlink attacks and race conditions,…

An identified vulnerability in the Pluggable Authentication Modules (PAM) framework, designated as CVE-2025-8941, has been classified as high severity. This issue allows attackers with local access to exploit symlink attacks and race conditions, potentially leading to full root privilege escalation.

The vulnerability poses a significant risk as it could lead to widespread system compromise and data breaches. It specifically affects systems relying on Linux-PAM for user authentication, including servers and desktops. Local users may obtain superuser privileges, raising concerns for both corporate and personal networks.

The CVE-2025-8941 vulnerability has a CVSS v3.1 score of 7.8, indicating its high impact potential. It requires local access and low privileges, with some user interaction, making it a significant risk in shared environments.

Aspect Details

An identified vulnerability in the Pluggable Authentication Modules (PAM) framework, designated as CVE-2025-8941, has been classified as high severity.
Jonathan Pierce · Thehackingpost

CVE ID CVE-2025-8941 Severity High (7.8 CVSS Score) Attack Vector Local Privileges Required Low User Interaction Required Impact System compromise, data leakage

All versions of Linux-PAM prior to the latest patches are affected, impacting distributions like Ubuntu, Fedora, and Red Hat Enterprise Linux. The vulnerability is confined to local exploitation, increasing risk in multi-user setups. The issue resides in the pam_namespace module, which mishandles user-controlled paths, allowing attackers to insert symbolic links that interfere with directory creation processes.

Attackers can exploit a race condition to manipulate system operations, potentially gaining unauthorized access to root-level resources. Effective exploitation requires precise timing and scripting, but successful attempts allow root-level control, enabling malicious activities.

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Immediate patching is recommended to mitigate this vulnerability. Administrators are advised to audit local user privileges, disable unnecessary pam_namespace features, and monitor for unusual symlink activity using tools like auditd. Web application firewalls or intrusion detection systems provide partial protection but are insufficient against local exploits. Organizations should prioritize patching to prevent potential system compromise.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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