CVE-2026-43603
Description
A flaw was found in the AMD Linux GPU driver. This vulnerability allows a local user to cause a Denial of Service (DoS) by triggering an invalid memory access (a null pointer dereference) in the driver. Successful exploitation causes an operating system kernel crash.
Statement
This vulnerability is rated as Moderate impact because triggering the defect requires local access and results solely in a kernel panic and denial of service, without compromising host confidentiality or data integrity. Exposure is limited to systems equipped with physical AMD graphics hardware that actively load the associated kernel GPU driver. Headless server deployments, virtualized instances without GPU passthrough, and systems where this driver is not loaded are unaffected.
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.
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