CVE-2026-31582

Description

A flaw was found in the Linux kernel's hwmon subsystem. A local attacker, by disconnecting a USB device, could trigger a use-after-free vulnerability in the powerz driver. This occurs when the driver attempts to access a Universal Serial Bus Request Block (URB) after it has been freed during the disconnect process. This flaw can lead to system instability or a denial of service (DoS).

Understanding the Weakness (CWE)

CWE-825

Confidentiality

Technical Impact: Read Memory

If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.

Availability

Technical Impact: DoS: Crash, Exit, or Restart

If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.

Integrity,Confidentiality,Availability

Technical Impact: Execute Unauthorized Code or Commands

If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.

Frequently Asked Questions

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