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CVE-2026-98956 Linux CVE debrief

A Linux kernel vulnerability, CVE-2026-98956, allows sleepy powerdown GPIOs in the ASoC adau1372 driver. The Linux kernel was updated to use the _cansleep variant of gpiod_set_value() to avoid warnings when using I2C controlled GPIO expanders. This change enables the use of sleepy GPIOs for powering off the chip, addressing the issue. System administrators and Linux kernel developers should verify their kernel versions and ensure proper GPIO handling to prevent potential issues. This vulnerability highlights the importance of staying up-to-date with Linux kernel updates and proper configuration.

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, system administrators responsible for Linux kernel updates, and security teams should be aware of this vulnerability and its potential impact. They should verify their kernel versions and ensure proper GPIO handling to prevent potential issues. Additionally, operators and platform administrators may need to review their system configurations and update if necessary.

Why it matters

Linux kernel vulnerability CVE-2026-98956 allows sleepy powerdown GPIOs in the ASoC adau1372 driver, requiring verification of Linux kernel versions and proper GPIO handling.

  • Verify Linux kernel versions and ensure proper GPIO handling to prevent potential issues
  • Update Linux kernel to avoid warnings when using I2C controlled GPIO expanders

Technical summary

The Linux kernel vulnerability CVE-2026-98956 allows sleepy powerdown GPIOs in the ASoC adau1372 driver. The fix uses the _cansleep variant of gpiod_set_value() to avoid warnings when using I2C controlled GPIO expanders. This change enables the use of sleepy GPIOs for powering off the chip, addressing the issue. The vulnerability highlights the importance of staying up-to-date with Linux kernel updates and proper configuration. Linux kernel developers and maintainers should review their configurations and update if necessary.

Defensive priority

Verify Linux kernel versions and update if necessary

Recommended defensive actions

  • Verify Linux kernel versions and update if necessary
  • Review system configurations and ensure proper GPIO handling
  • 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
  • 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

Evidence notes

The CVE record and source item provide details on the Linux kernel vulnerability and its fix. The vulnerability allows sleepy powerdown GPIOs in the ASoC adau1372 driver. The fix uses the _cansleep variant of gpiod_set_value() to avoid warnings when using I2C controlled GPIO expanders. Defenders should verify Linux kernel versions and ensure proper GPIO handling to prevent potential issues. The source item provides additional context on the vulnerability, but its scope and affected systems are not explicitly stated.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-98956 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-98956

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

  • CVE-2026-98956 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-98956

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

Supplemental references

  • ASoC: adau1372: allow sleepy powerdown GPIOs

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/98xxx/CVE-2026-98956.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/1eb957ff50d74fe3fb56cf77184dfa9bd0f4a541

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/9a13f13b11e1f36a3cbf79cae1862d87bd74f890

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/58905982b0d912021325f5de84facae86cc0f2f2

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/6cf4c3c9b7a4df0fe4cc67481b7b251cff781b29

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/47c0c7a051b70d396774d5dc27b23283c28c3555

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/65cd0e21746b812d311e9fac6d473dd62f0ad52a

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/64dd172bbffe6135d79a06ddad53dd2da4d8bd62

    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.