NA48 results on kaon and hyperon decays relevant to |$V_{us}|$

New results from the NA48 experiment on kaon and hyperon decays relevant to $|V_us|$ are reported here. For charged kaons we present measurements of $BR(K^{\pm} \rightarrow \pi^{0} e^{\pm}\nu)$ and $BR(K^{\pm} \rightarrow \pi^{0}\mu^{\pm}\nu)$. On neutral kaon decays we report the measurements of $BR(K_{L} \rightarrow \pi^{+}\pi^{-})$ and of $K_{L} \rightarrow \pi^{\pm}\mu^{\mp}\nu$ form factors slopes. For hyperons we present results on the $BR(\Xi^{0} \rightarrow \Sigma^{+} e^{-}\bar{\nu}_e)$.