CVE-2026-89623
Description
A flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221 driver. This vulnerability occurs when the device's input/output (IO) operations are not properly stopped before hardware teardown during device removal or probe failure. This timing issue can lead to a use-after-free condition, where the system attempts to access memory that has already been released. Such a condition could result in system instability or a denial of service.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
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.
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