CVE-2026-43424
Description
A flaw was found in the Linux kernel's USB gadget subsystem (f_tcm). A malicious or misconfigured USB host can exploit a race condition by sending specific Bulk-Only Transport (BOT) commands. This can trigger a NULL pointer dereference, leading to a kernel panic and a local Denial of Service (DoS) on the affected system.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart
NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation.
Integrity,Confidentiality
Technical Impact: Execute Unauthorized Code or Commands; Read Memory; Modify Memory
In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.
Frequently Asked Questions
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