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CVE-2026-98263: ASoC: codecs: rt712-sdca-dmic: fix uninitialized stream_config->type

• Severity: unknown
• 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: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: rt712-sdca-dmic: fix uninitialized stream_config->type stream_config is not initialized before being passed to sdw_stream_add_slave(). The type field may contain garbage and is later copied to stream->type by sdw_config_stream(). Zero-initialize stream_config so type defaults to SDW_STREAM_PCM. While at it, use snd_sdw_params_to_config() helper instead of open-coding the same logic.

Affected products

• Linux kernel: 6.4 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/03a5699a0a04309c597683967aaaf25d1e555ea2
• https://git.kernel.org/stable/c/6507055733a9d397289277408b52daf422f8a814
• https://git.kernel.org/stable/c/a318ee718e7448cd6bf62d9b3197b6a6a8d4701e
• https://git.kernel.org/stable/c/c144447c207e2be24d6ac86d544691ba464caad8
• https://git.kernel.org/stable/c/d93988c9e58d37b677f6ee8aceae741c8d1e30ad

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