Bug 2516792 (CVE-2026-74293)

Summary: CVE-2026-74293 kernel: ASoC: fsl: fsl_audmix: Validate written enum values
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Advanced Linux Sound Architecture System on Chip (ASoC) subsystem, specifically within the `fsl_audmix` component. The `fsl_audmix_put_mix_clk_src()` and `fsl_audmix_put_out_src()` functions do not properly validate user-provided enum values before processing them. This improper validation could allow a local attacker to supply out-of-range values, potentially leading to unexpected system behavior or a denial of service.
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Description OSIDB Bzimport 2026-08-15 06:33:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: fsl: fsl_audmix: Validate written enum values

fsl_audmix_put_mix_clk_src() and fsl_audmix_put_out_src()
convert the user-provided enum item with snd_soc_enum_item_to_val()
before checking whether the item is within the enum's item count.

The generic snd_soc_put_enum_double() helper performs that
validation, but these callbacks use the converted value first: the
clock-source path tests it with BIT(), and the output-source path
indexes the prms transition table with it.

Reject out-of-range enum items before converting them.
Comment 1 gkamathe 2026-08-19 08:49:46 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74293-aa3d@gregkh/T