CVE-2023-53648
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-07

Last updated on: 2026-02-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer smatch error: sound/pci/ac97/ac97_codec.c:2354 snd_ac97_mixer() error: we previously assumed 'rac97' could be null (see line 2072) remove redundant assignment, return error if rac97 is NULL.
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Meta Information
Published
2025-10-07
Last Modified
2026-02-03
Generated
2026-06-16
AI Q&A
2025-10-07
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53648
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a possible NULL pointer dereference in the ALSA ac97 mixer component of the Linux kernel. Specifically, the snd_ac97_mixer function incorrectly assumed that the 'rac97' pointer could never be NULL, which could lead to a NULL dereference and potential kernel crash or instability. The fix involves removing a redundant assignment and adding a check to return an error if 'rac97' is NULL.

Impact Analysis

This vulnerability can cause the Linux kernel to crash or become unstable due to a NULL pointer dereference in the ALSA ac97 mixer code. This could lead to denial of service or system instability when the affected sound driver is used.

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