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PatchSiren cyber security CVE debrief

CVE-2026-99069 Linux CVE debrief

A type confusion vulnerability in the Linux kernel's ati_remote2 driver has been addressed. The vulnerability occurred when the channel_mask and mode_mask attributes were registered on the parent usb_device via sysfs_create_group(). However, when the driver was converted to use the driver core to instantiate device attributes, the attributes moved to the bound usb_interface devices, but the show and store callbacks were not updated accordingly. This resulted in the callbacks invoking to_usb_device() on a device pointer belonging to a struct usb_interface, producing an invalid usb_device pointer.

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

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of the affected Linux kernel versions should assess their exposure and apply the fix to prevent potential issues. Additionally, system administrators responsible for Linux-based systems, security teams evaluating vulnerabilities, and operators managing Linux deployments should be aware of this vulnerability and take necessary actions to mitigate risks. This includes updating

Why it matters

A type confusion vulnerability in the Linux kernel's ati_remote2 driver has been addressed. Linux kernel developers and maintainers, Linux distribution maintainers, and users of the affected Linux kernel versions should assess their exposure and apply the fix to prevent potential issues.

  • Verify device attribute handlers for type confusion issues.
  • Update device attribute handlers to use to_usb_interface() directly.
  • Assess exposure of Linux kernel versions to this vulnerability.
  • Review and apply fixes to prevent similar type confusion issues.

Technical summary

The Linux kernel's ati_remote2 driver had a type confusion vulnerability due to incorrect usage of to_usb_device() in device attribute handlers. The fix updates the handlers to use to_usb_interface() directly, ensuring accurate device interface management and preventing potential system instability. This change addresses the vulnerability by correctly identifying and interacting with USB interfaces, which is crucial for maintaining the security and stability of Linux kernel-based systems. By applying this fix, developers can prevent attackers from exploiting the type confusion issue to gain unauthorized access or control.

Defensive priority

Medium

Recommended defensive actions

  • Review the affected versions and packages to determine if your system is vulnerable.
  • Apply the fix to update the show and store callbacks to use to_usb_interface() directly.
  • Verify that the fix resolves the type confusion issue in the device attribute handlers.
  • 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 source item provide details about the vulnerability and its fix. However, the CVSS score and severity are not provided. The affected versions and packages are specified, but the information is limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-99069 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-99069

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

  • CVE-2026-99069 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-99069

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

Supplemental references

  • Input: ati_remote2 - fix type confusion in device attribute handlers

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/99xxx/CVE-2026-99069.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/e44ec6b6d3c0b8ea089b589fa0cce49a4da66b89

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/d738e51bf2c21921df351f536147178ae3cbd38b

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/2caae9d1977beea0a7914b3d86639262801fd116

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/f321cc430c49b6c1be0d53f2ef19d8342d8029cc

    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.