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PatchSiren cyber security CVE debrief

CVE-2026-98971 Linux CVE debrief

A Linux kernel vulnerability allows for a potential memory leak when registering a cleanup action fails in the gpio: exar module. The issue arises from storing the allocated ID in exar_gpio after registering the action, which can lead to releasing ID 0 if failure occurs. To address this, store the ID before registering the cleanup action. This change ensures that the correct ID is released in case of failure, preventing potential memory leaks and maintaining system stability. Linux kernel developers and maintainers should review and update affected kernel versions to mitigate this vulnerability.

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 maintainers, and users of Linux kernel versions affected by this vulnerability should be aware of this issue. They should review and update affected kernel versions to mitigate this vulnerability and prevent potential memory leaks. Additionally, they should verify gpio: exar module configurations to ensure system stability.

Why it matters

The vulnerability in the Linux kernel's gpio: exar module requires attention from Linux kernel developers, maintainers, and users to prevent potential memory leaks and ensure system stability.

  • Potential memory leak in gpio: exar module
  • Verification of Linux kernel versions and configurations required
  • Update and patch management for Linux kernel necessary

Technical summary

The vulnerability in the Linux kernel's gpio: exar module occurs when the ID is stored after registering the cleanup action. This can lead to a memory leak if the registration fails. The fix involves storing the ID before registering the cleanup action, ensuring that the correct allocation is released in case of failure. This change prevents potential memory leaks and maintains system stability. The vulnerability is related to the gpio: exar module's initialization of the ID before registering its cleanup. To address this, Linux kernel developers and maintainers should review and update affected kernel versions.

Defensive priority

Medium

Recommended defensive actions

  • Review and update Linux kernel versions to ensure the fix is applied
  • Verify gpio: exar module configurations to prevent potential memory leaks
  • Monitor Linux kernel updates for related patches
  • Perform a thorough review of the Linux kernel's gpio: exar module to identify potential vulnerabilities
  • Implement compensating controls for exposed systems while remediation is scheduled and verified
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Assign an owner for follow-up on affected product deployments in managed environments

Evidence notes

The CVE record and source item provide details on the vulnerability in the Linux kernel's gpio: exar module. The issue is related to the initialization of the ID before registering its cleanup. References include multiple source references from the Linux kernel repository. To verify, defenders should check the Linux kernel repository for related patches and update their kernel versions accordingly. The vulnerability's source confidence is limited to the provided CVE record and source item.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-98971 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-98971

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

  • CVE-2026-98971 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-98971

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

Supplemental references

  • gpio: exar: initialize the ID before registering its cleanup

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/98xxx/CVE-2026-98971.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/0250acba81654b2ee50bde324ad72b3f0c04d0bd

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/88b9c4bbf83d940ab672956e5af921215905dcb4

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/bf3d841ef12fcbec4458e2750956b738b043a226

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/b78c114600ae3df90c083c72c290437b068577c8

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/01318927a9055136c207399eeb36ce07becac179

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/f7ec4dbd2a073dd53b6349be1c586fe8580dd6b2

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/4d69e74034b208588636ecc177e0dd43a7696af3

    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.