CVE-2025-71291
Description
A flaw was found in the Linux kernel's bcm_vk module. A null-pointer dereference can occur within the bcm_vk_read() function if a specific condition is met where a pointer entry is NULL and an error code -EMSGSIZE is returned. This vulnerability could allow a local attacker to cause system instability or a denial of service (DoS).
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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