diff --git a/pkgs/by-name/xe/xen/package.nix b/pkgs/by-name/xe/xen/package.nix
index 737d93638b19..4c124470a9e3 100644
--- a/pkgs/by-name/xe/xen/package.nix
+++ b/pkgs/by-name/xe/xen/package.nix
@@ -204,6 +204,12 @@ stdenv.mkDerivation (finalAttrs: {
       hash = "sha256-mHoY+Y8klwLYOo4LZCwYcNsB1BcBbSa1nQOn3NueDdI=";
     })
 
+    # XSA #481
+    (fetchpatch {
+      url = "https://xenbits.xenproject.org/xsa/xsa481.patch";
+      hash = "sha256-QpRXS4rFuML2TawH7yhUmg8U4C1ATt4xiLLs91duuO8=";
+    })
+
     # patch `libxl` to search for `qemu-system-i386` properly. (Before 4.21)
     (fetchpatch {
       url = "https://github.com/xen-project/xen/commit/f6281291704aa356489f4bd927cc7348a920bd01.diff?full_index=1";