CVE-2026-68303
Description
A flaw was found in the Linux kernel's drm/vc4 drivers, specifically in the hvs and v3d components. When these drivers are being removed, they attempt to access memory that has already been freed. This occurs because they try to retrieve driver data from a master device that is no longer available, leading to a null pointer dereference. A local attacker could potentially exploit this vulnerability 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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