What’s Vulnerable › Vulnerabilities

CVE-2023-53648: ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-07 · updated 2026-06-17
• Weakness: CWE-476

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 products

• Linux kernel: from 2.6.28 before 4.14.322; from 4.15 before 4.19.291; from 4.20 before 5.4.251; from 5.5 before 5.10.188; from 5.11 before 5.15.121; from 5.16 before 6.1.39 — fixed in 4.14.322, 4.19.291, 5.10.188, 5.15.121, 5.4.251, 6.1.39

How to fix

Upgrade to a fixed version: Linux kernel 4.14.322, 4.19.291, 5.10.188, 5.15.121. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09baf460dfba79ee6a0c72e68ccdbbba84d894df
• https://git.kernel.org/stable/c/228da1fa124470606ac19783e551f9d51a1e01b0
• https://git.kernel.org/stable/c/300e26e3e64880de5013eac8831cf44387ef752c
• https://git.kernel.org/stable/c/5f13d67027fa782096e6aee0db5dce61c4aeb613
• https://git.kernel.org/stable/c/79597c8bf64ca99eab385115743131d260339da5
• https://git.kernel.org/stable/c/809af7bb4219bdeef0dbb8b2ed700d6516d13fe9
• https://git.kernel.org/stable/c/d28b83252e150155b8b8c65b612c555e93c8b45f
• https://git.kernel.org/stable/c/e4cccff1e7ab6ea30995b6fbbb007d02647e025c
• https://git.kernel.org/stable/c/f923a582217b198b557756809ffe42ac0fad6adb

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