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PatchSiren cyber security CVE debrief

CVE-2026-98940 Linux CVE debrief

A Linux kernel vulnerability was resolved, addressing an issue in the ASoC qcom lpass-cpu driver where the DAI ID was incorrectly used to index the variant->dai_driver table, potentially leading to incorrect DAI table access on platforms with sparse DAI IDs. This issue could result in improper configuration of DAI playback channel constraints, affecting Linux kernel versions. The fix involves using the loop index i when updating the current DAI's playback channel constraints, while retaining dai_id for indexing the hardware-port specific playback SD-line mode array.

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-23
Original CVE updated
2026-10-30
Advisory published
2026-10-23
Advisory updated
2026-10-30

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux-based systems with ASoC qcom lpass-cpu driver configurations should verify Linux kernel versions, assess exposure based on used DAI configurations, review and apply patches from Linux kernel stable branches, and monitor Linux kernel updates to track exposure to known vulnerable versions.

Why it matters

This vulnerability affects Linux kernel versions and requires verification of used DAI configurations and application of patches from Linux kernel stable branches.

  • Verify Linux kernel versions and assess exposure based on used DAI configurations
  • Review and apply patches from Linux kernel stable branches
  • Monitor Linux kernel updates and track exposure to known vulnerable versions

Technical summary

The Linux kernel ASoC qcom lpass-cpu driver incorrectly used the DAI ID to index the variant->dai_driver table. This could lead to incorrect DAI table access on platforms with sparse DAI IDs. The issue was resolved by using the loop index i when updating the current DAI's playback channel constraints, while retaining dai_id for indexing the hardware-port specific playback SD-line mode array. The fix ensures proper configuration of DAI playback channel constraints, affecting Linux kernel versions. The vulnerability requires verification of used DAI configurations and application of patches from Linux kernel stable branches.

Defensive priority

Verify Linux kernel versions and assess exposure based on used DAI configurations.

Recommended defensive actions

  • Verify Linux kernel versions and assess exposure based on used DAI configurations.
  • Review and apply patches from Linux kernel stable branches.
  • Monitor Linux kernel updates and track exposure to known vulnerable versions.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information on the vulnerability. Supplemental source references include multiple Linux kernel commit hashes. The vulnerability affects Linux kernel versions and requires verification of used DAI configurations and application of patches from Linux kernel stable branches. The issue was resolved by using the loop index i when updating the current DAI's playback channel constraints. Defenders should verify Linux kernel versions, assess exposure based on used DAI, and

Sources and references

Verified primary and authoritative sources

  • CVE-2026-98940 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-98940

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-98940 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-98940

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • ASoC: qcom: lpass-cpu: use DAI table index for playback constraints

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/98xxx/CVE-2026-98940.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/c10823507a74d7474391c01121e3f59901b1789f

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/63987bb73df65fb01245b5905b005aa47c1dd27a

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/775df6a27e8433e2414124472938009b958f9a77

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/6833f1893ac2ec40016c348779af63debf3700d2

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/69d2b7a4c115181629eb14d800aecc3e7de3f7fb

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/f11336e6d3cd9e28e5cdf1cb8a6171e7c3eff4e4

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/ca51771c8efde5df05476ac98dd1b2af4e2b149f

    Supplemental source

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.