Sandbox Escape via PipeWire PulseAudio Compatibility Layer

Executive Summary

CVE-2026-5674 is a vulnerability in PipeWire, a multimedia server, that allows sandbox escape. An attacker with minimal permissions in a sandboxed environment (like Flatpak) can load a malicious library through PipeWire's PulseAudio compatibility layer. This leads to arbitrary code execution outside the sandbox, potentially compromising the entire system.

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Detection Guidance

Check PipeWire version with 'pipewire --version' to see if it is 1.0.5 or older. Look for suspicious module loading activity in logs using 'journalctl -u pipewire' or 'grep -i ladspa /var/log/syslog'. Inspect directories like /tmp/ or user-writable paths for unexpected .so files.

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Impact Analysis

This vulnerability allows attackers to break out of sandboxed applications, gaining full control over your system. Even with limited permissions, an attacker could execute malicious code, steal data, install malware, or perform other harmful actions on your computer.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations using affected PipeWire versions may face compliance failures, legal penalties, and reputational damage due to potential data breaches.

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Mitigation Strategies

Disable module loading in PipeWire by setting 'pulse.allow-module-loading = false' in the PipeWire config. Restrict library loading to trusted paths like /usr/lib/ladspa/ by modifying PipeWire's configuration. Remove unnecessary write permissions from directories accessible to sandboxed applications.

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