Will cervical spinal senosis cause numbness/weakness in both arms?

Depends: Cervical stenosis can certainly cause numbness and weakness. It is important to have your images reviewed to establish if treatment is necessary. What determines symptoms is the degree and location of the narrowing.

Possible: Cervical stenosis, or narrowing of the spinal canal, can cause arm weakness and sensory changes (tingling, burning, numbness). However, just because there is stenosis, does not mean that it will produce symptoms. Close follow up by your doctor is recommended.