CVE-2022-48363 in MPD
Summary
by MITRE • 02/27/2023
In MPD before 0.23.8, as used on Automotive Grade Linux and other platforms, the PipeWire output plugin mishandles a Drain call in certain situations involving truncated files. Eventually there is an assertion failure in libmpdclient because libqtappfw passes in a NULL pointer.
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Analysis
by VulDB Data Team • 05/17/2026
The vulnerability CVE-2022-48363 affects the Music Player Daemon (MPD) software version 0.23.7 and earlier, specifically impacting systems utilizing Automotive Grade Linux and similar platforms. This issue resides within the PipeWire output plugin component of MPD, which serves as a critical interface for audio output management in automotive and embedded systems. The vulnerability manifests during specific conditions involving truncated files and improper handling of Drain calls, creating a cascade of failures that ultimately leads to system instability and potential denial of service conditions.
The technical flaw stems from improper pointer management within the PipeWire output plugin implementation where a NULL pointer is passed to libmpdclient during the Drain call processing. This occurs when MPD encounters truncated audio files during playback operations, particularly in automotive environments where audio streams may be interrupted or corrupted due to network conditions or hardware limitations. The assertion failure in libmpdclient represents a critical breakdown in the software's error handling mechanisms, where the expected validation checks fail to properly validate input parameters before processing. This type of vulnerability aligns with CWE-476 which specifically addresses NULL pointer dereference conditions, and represents a classic example of improper input validation leading to system crashes.
The operational impact of this vulnerability extends beyond simple system crashes, particularly in automotive and embedded environments where reliability is paramount. Automotive Grade Linux systems depend heavily on stable audio playback for infotainment and safety-critical applications, making this vulnerability particularly concerning. When the assertion failure occurs, it can result in complete audio system failures, potentially disrupting critical vehicle functions that rely on audio feedback. The vulnerability's exploitation requires specific conditions involving truncated files, but once triggered, it can cause cascading failures that affect the entire MPD service and potentially the broader system stability. This represents a significant concern for automotive manufacturers who rely on these platforms for their vehicle entertainment and communication systems.
Mitigation strategies for CVE-2022-48363 should prioritize immediate software updates to MPD version 0.23.8 or later, which contains the necessary patches to address the pointer handling issues in the PipeWire output plugin. Organizations should implement comprehensive testing procedures to validate that audio playback operations function correctly under various file conditions, particularly those involving corrupted or truncated files. System administrators should consider implementing monitoring solutions that can detect assertion failures and automatically restart affected services to minimize downtime. Additionally, organizations should review their automotive software update processes to ensure rapid deployment of security patches, as this vulnerability could potentially be exploited to cause service disruption in automotive environments where audio systems are integral to vehicle operation. The ATT&CK framework categorizes this vulnerability under T1499 which involves network denial of service attacks, as the assertion failure can result in service disruption that impacts system availability and user experience.