diff --git a/doc/api/permissions.md b/doc/api/permissions.md
index b849d98a54d54f..5012c34597685e 100644
--- a/doc/api/permissions.md
+++ b/doc/api/permissions.md
@@ -580,6 +580,8 @@ There are constraints you need to know before using this system:
   not subject to the rules of the Permission Model.
 * OpenSSL engines cannot be requested at runtime when the Permission
   Model is enabled, affecting the built-in crypto, https, and tls modules.
+* Using existing file descriptors via the `node:fs` module bypasses the
+  Permission Model.
 
 #### Limitations and Known Issues