CVE-2026-23438
Description
A flaw was found in the Linux kernel's mvpp2 driver. A local privileged user could cause a system crash, leading to a Denial of Service (DoS), by triggering a null pointer dereference. This occurs when changing the Maximum Transmission Unit (MTU) on systems where the CM3 SRAM resource is not present, due to improper handling of hardware access in the mvpp2_bm_switch_buffers() function.
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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