ALSA: oss: Fix PCM OSS buffer allocation overflow

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002284: ALSA: oss: Fix PCM OSS buffer allocation overflow. Affects Kernel versions < 0c4190b41a69990666b4000999e27f8f1b2a426b. No fix is published. How to fix ↓

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Background

The ALSA (Advanced Linux Sound Architecture) is a software framework and part of the Linux kernel that provides an API for sound card drivers. It enables sound playback and recording on Linux systems. The PCM OSS (Open Sound System) is a component of ALSA that provides compatibility with the legacy OSS API. It allows applications that were designed for OSS to work with ALSA. PCM OSS handles the allocation and management of PCM (Pulse Code Modulation) buffers for sound data.

Vulnerability Detail

The PCM OSS buffer allocation in ALSA is vulnerable to an overflow issue. This vulnerability could potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. The overflow occurs when allocating a buffer for PCM data, leading to a buffer overflow and potential memory corruption. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

The ALSA PCM OSS buffer allocation overflow vulnerability has been identified and fixed in Linux Kernel version v5.4.188. Users are advised to update their Linux Kernel to the latest version to ensure the security of their systems. For further support on vulnerability remediation, please contact DevNack.com.

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