CVE-2026-46257
Description
A flaw was found in the Linux kernel's SP804 timer driver. On ARM32 platforms where the SP804 is not registered as the scheduling clock, the delay timer's clock event instance may not be properly initialized. This can lead to a kernel Oops, which is a system crash, when the system attempts to read from the uninitialized timer. This vulnerability could allow a local attacker to cause a Denial of Service (DoS) on the affected system.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the uninitialized pointer is used in a read operation, an attacker might be able to read sensitive portions of memory.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the uninitialized pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the uninitialized pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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