docs/rules/no-undefined-types.md

@@ -807,6 +807,15 @@ function quux(foo) {
 
 quux(0);
 
+function quux() {
+  const foo = 1;
+  /** {@link foo} */
+  const bar = foo;
+  console.log(bar);
+}
+
+quux();
+
 /**
  * @import BadImportIgnoredByThisRule
  */

src/rules/noUndefinedTypes.js

@@ -222,6 +222,21 @@ export default iterateJsdoc(({
   //  Program scope inside
   const cjsOrESMScope = globalScope.childScopes[0]?.block?.type === 'Program';
 
+  /**
+   * @param {import("eslint").Scope.Scope | null} scope
+   * @returns {Set<string>}
+   */
+  const getValidRuntimeIdentifiers = (scope) => {
+    const result = new Set()
+    while (scope) {
+      for (const {name} of scope.variables) {
+        result.add(name)
+      }
+      scope = scope.upper
+    }
+    return result
+  };
+
   const allDefinedTypes = new Set(globalScope.variables.map(({
     name,
   }) => {
@@ -247,6 +262,7 @@ export default iterateJsdoc(({
     .concat(importTags)
     .concat(definedTypes)
     .concat(/** @type {string[]} */ (definedPreferredTypes))
+    .concat(...getValidRuntimeIdentifiers(node && sourceCode.getScope(node)))
     .concat(
       settings.mode === 'jsdoc' ?
         [] :

test/rules/assertions/noUndefinedTypes.js

@@ -1482,6 +1482,18 @@ export default /** @type {import('../index.js').TestCases} */ ({
         'no-unused-vars': 'error',
       },
     },
+    {
+      code: `
+          function quux() {
+            const foo = 1;
+            /** {@link foo} */
+            const bar = foo;
+            console.log(bar);
+          }
+
+          quux();
+      `,
+    },
     {
       code: `
         /**