CVE-2025-71192
Unknown Unknown - Not Provided
Double Free Vulnerability in Linux ALSA AC97 Controller

Publication date: 2026-02-04

Last updated on: 2026-02-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: ac97: fix a double free in snd_ac97_controller_register() If ac97_add_adapter() fails, put_device() is the correct way to drop the device reference. kfree() is not required. Add kfree() if idr_alloc() fails and in ac97_adapter_release() to do the cleanup. Found by code review.
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Meta Information
Published
2026-02-04
Last Modified
2026-02-04
Generated
2026-06-16
AI Q&A
2026-02-04
EPSS Evaluated
2026-06-15
NVD
CVE-2025-71192
EUVD
EUVD-2025-206806
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a double free issue in the ALSA ac97 controller component of the Linux kernel. Specifically, in the function snd_ac97_controller_register(), if the function ac97_add_adapter() fails, the device reference should be dropped using put_device(), not kfree(). Incorrectly calling kfree() can lead to freeing memory twice, which is a double free vulnerability.

Impact Analysis

A double free vulnerability can lead to undefined behavior such as memory corruption, crashes, or potentially allow an attacker to execute arbitrary code. In this case, the improper memory management in the ALSA ac97 controller could destabilize the system or be exploited to compromise system security.

Compliance Impact

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