CVE-2025-39690:Uninitialized stack data leak in Linux kernel's IIO accel sca3300 driver

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Description Preview

A vulnerability in the Linux kernel's Industrial I/O (IIO) accelerometer driver for the SCA3300 device has been identified and resolved. The issue involved potential leakage of uninitialized stack data to userspace due to the 'channels' array not being properly zeroed before use. This could potentially expose sensitive information to unprivileged users.

Overview

The vulnerability affects the Linux kernel's IIO subsystem, specifically the accelerometer driver for the SCA3300 device. The root cause of the issue was the failure to initialize the 'channels' array before its utilization, which could lead to the exposure of uninitialized stack data to userspace. This type of vulnerability can be exploited by malicious actors to gain access to sensitive information that may be present in the uninitialized memory. The severity of the issue depends on the nature of the data that could potentially be leaked, but it represents a security risk that needed to be addressed promptly.

Remediation

The vulnerability has been resolved by implementing a fix that ensures the 'channels' array is properly zeroed before use. This preventive measure eliminates the possibility of leaking uninitialized stack data to userspace. System administrators and users are strongly advised to update their Linux kernel to the latest version that includes this security patch. It is crucial to follow the standard kernel update procedures for your specific distribution to apply the fix effectively. Additionally, it is recommended to review and apply any other security updates that may be available for your system to maintain overall security posture.

References

[1] Linux Kernel Git Repository. "iio: accel: sca3300: fix uninitialized iio scan data." https://git.kernel.org/stable/c/4e5b705cc6147f0b9173c6219079f41416bdd3c0

[2] Linux Kernel Git Repository. "Additional commit related to the vulnerability fix." https://git.kernel.org/stable/c/c88c04adb8611e436e1e773fd5db3f8d7397d089

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Health Care & Social Assistance: Low
    Health Care & Social Assistance
  2. Public Administration: Low
    Public Administration
  3. Accommodation & Food Services: Low
    Accommodation & Food Services
  4. Administrative, Support, Waste Management & Remediation Services: Low
    Administrative, Support, Waste Management & Remediation Services
  5. Agriculture, Forestry Fishing & Hunting: Low
    Agriculture, Forestry Fishing & Hunting
  6. Arts, Entertainment & Recreation: Low
    Arts, Entertainment & Recreation
  7. Construction: Low
    Construction
  8. Educational Services: Low
    Educational Services
  9. Finance and Insurance: Low
    Finance and Insurance
  10. Information: Low
    Information
  11. Management of Companies & Enterprises: Low
    Management of Companies & Enterprises
  12. Manufacturing: Low
    Manufacturing
  13. Mining: Low
    Mining
  14. Other Services (except Public Administration): Low
    Other Services (except Public Administration)
  15. Professional, Scientific, & Technical Services: Low
    Professional, Scientific, & Technical Services
  16. Real Estate Rental & Leasing: Low
    Real Estate Rental & Leasing
  17. Retail Trade: Low
    Retail Trade
  18. Transportation & Warehousing: Low
    Transportation & Warehousing
  19. Utilities: Low
    Utilities
  20. Wholesale Trade: Low
    Wholesale Trade

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