CVE-2026-72303 in Linux
Summary
by MITRE • 08/15/2026
In the Linux kernel, the following vulnerability has been resolved:
ASoC: SOF: ipc4-control: Validate notification payload size
Validate MODULE_NOTIFICATION payload length before reading bytes/channel data in control update handling.
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Analysis
by VulDB Data Team • 08/15/2026
The vulnerability addressed in this linux kernel patch relates to a critical flaw in the Sound Open Firmware (SOF) subsystem within the Advanced SoC (ASoC) framework. This issue specifically impacts the ipc4-control module which handles communication between the kernel and firmware for audio processing tasks. The vulnerability stems from insufficient validation of notification payload sizes during control update operations, creating potential attack vectors that could be exploited by malicious actors to manipulate audio system behavior.
The technical flaw manifests when the SOF subsystem processes MODULE_NOTIFICATION payloads without first validating their size constraints before attempting to read channel data bytes. This improper validation creates a classic buffer over-read condition where the kernel may attempt to access memory beyond the allocated buffer boundaries. The vulnerability is particularly concerning because it occurs within the firmware communication layer that manages audio device controls and system notifications, potentially allowing attackers to craft malicious payloads that could trigger memory corruption or information disclosure.
From an operational impact perspective, this vulnerability could enable attackers with local privileges or those able to inject malicious firmware commands to cause system instability through kernel memory corruption. The attack surface extends to any system utilizing SOF-based audio hardware where the ipc4-control module is active, potentially affecting desktop computers, laptops, embedded systems, and mobile devices running linux kernels with affected versions. The exploitation could result in system crashes, privilege escalation opportunities, or data leakage from kernel memory spaces that contain sensitive audio processing information.
The mitigation strategy involves implementing proper input validation before any payload data processing occurs. This requires adding size checks to ensure notification payloads conform to expected parameters before attempting to parse channel data bytes. The fix aligns with cybersecurity best practices and follows principles outlined in common weakness enumeration cwes such as cwe 129 input validation and cwe 787 out of bounds write. Security frameworks like the mitre attack framework would categorize this vulnerability under initial access or privilege escalation techniques that leverage kernel-level flaws to gain unauthorized system control. Organizations should prioritize applying this patch to all affected systems and monitor for potential exploitation attempts in their network security monitoring systems, particularly focusing on unusual firmware communication patterns or audio subsystem anomalies that might indicate attempted exploitation of this vulnerability.