CVE-2023-53648

ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer

MEDIUM

5.5

CVSS Score

Published: October 7, 2025 at 03:19 PM UTC

Updated: June 17, 2026 at 06:45 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.28 ≤ v < 4.14.3222.6.28 ≤ v < 4.19.2912.6.28 ≤ v < 5.10.1882.6.28 ≤ v < 5.15.1212.6.28 ≤ v < 5.4.2512.6.28 ≤ v < 6.1.392.6.28 ≤ v < 6.3.132.6.28 ≤ v < 6.4.42.6.28 ≤ v < 6.54.15 ≤ v < 4.19.2914.20 ≤ v < 5.4.2515.11 ≤ v < 5.15.1215.16 ≤ v < 6.1.395.5 ≤ v < 5.10.1886.2 ≤ v < 6.3.136.4 ≤ v < 6.4.42.6.28da3cec35dd3c31d8706db4bf379372ce70d92118

Vendor states this is fixed in 09baf460dfba79ee6a0c72e68ccdbbba84d894df (fixed)

Vendor states this is fixed in 228da1fa124470606ac19783e551f9d51a1e01b0 (fixed)

Vendor states this is fixed in 300e26e3e64880de5013eac8831cf44387ef752c (fixed)

Vendor states this is fixed in 5f13d67027fa782096e6aee0db5dce61c4aeb613 (fixed)

Vendor states this is fixed in 79597c8bf64ca99eab385115743131d260339da5 (fixed)

Vendor states this is fixed in 809af7bb4219bdeef0dbb8b2ed700d6516d13fe9 (fixed)

Vendor states this is fixed in d28b83252e150155b8b8c65b612c555e93c8b45f (fixed)

Vendor states this is fixed in e4cccff1e7ab6ea30995b6fbbb007d02647e025c (fixed)

Vendor states this is fixed in f923a582217b198b557756809ffe42ac0fad6adb (fixed)

Vendor states this is fixed in 2.6.28 (unaffected)

Vendor states this is fixed in 4.14.322 (unaffected)

Vendor states this is fixed in 4.19.291 (unaffected)