CVE-2026-98744 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, as well as users of Linux-based systems with the max98363 component, should review and apply patches to address the vulnerability. Affected operators must verify Linux kernel versions and update if necessary. Vulnerability management and security teams should monitor system logs for unusual activity related to ASoC codecs and ensure system integrity.

Why it matters

A vulnerability in the Linux kernel's ASoC codecs, specifically in the max98363 component, has been addressed. The issue involves the uninitialized `stream_config->type` field. This has been resolved by zero-initializing `stream_config`.

• Verification of Linux kernel versions and patches is necessary to ensure system integrity.
• Monitoring system logs for unusual activity related to ASoC codecs is recommended.

Technical summary

The vulnerability involves an uninitialized stream_config->type field in the max98363 component of the Linux kernel's ASoC codecs. This field could contain garbage values and was later copied to stream->type by sdw_config_stream(). The issue has been resolved by zero-initializing stream_config to ensure type defaults to SDW_STREAM_PCM. The vulnerability was addressed by fixing the initialization of the stream_config structure, preventing potential garbage values in the type field from being copied to stream->type. This fix ensures the proper functioning of the sdw_config_stream() operation.

Defensive priority

Low priority, as the fix is straightforward and the vulnerability is not publicly exploited.

Recommended defensive actions

• Review and apply the provided patches to ensure the max98363 component is properly initialized.
• Verify the Linux kernel version and update if necessary.
• Monitor system logs for any unusual activity related to the ASoC codecs.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Four source references from the Linux kernel Git repository are provided, detailing the patches applied to resolve the issue. The vulnerability involves an uninitialized stream_config->type field in the max98363 component of the Linux kernel's ASoC codecs. This field could contain garbage values and was later copied to stream->type by sdw_config_stream(). The issue has been resolved by zero-initializing stream_config to ensure type defaults to SDW_STREAM_PCM. Evidence,

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.