diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 482baf3..59490eb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,3 +33,23 @@ jobs:
         run: cmake --build build --config Release --parallel 4
       - name: Run regression tests
         run: ctest --test-dir build -C Release --output-on-failure --no-tests=error --timeout 30
+  sanitizers:
+    name: Linux ASan and UBSan
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+      - name: Configure
+        run: >-
+          cmake -S tests -B build-sanitizers -DCMAKE_BUILD_TYPE=Debug
+          -DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer"
+          -DCMAKE_EXE_LINKER_FLAGS="-fsanitize=address,undefined"
+      - name: Build
+        run: cmake --build build-sanitizers --parallel 4
+      - name: Run regression tests
+        env:
+          ASAN_OPTIONS: detect_leaks=1:halt_on_error=1
+          UBSAN_OPTIONS: print_stacktrace=1:halt_on_error=1
+        run: ctest --test-dir build-sanitizers --output-on-failure --no-tests=error --timeout 30
diff --git a/src/share/dicttrie.cpp b/src/share/dicttrie.cpp
index 8c7d6d7..cf6360b 100644
--- a/src/share/dicttrie.cpp
+++ b/src/share/dicttrie.cpp
@@ -56,8 +56,8 @@ void DictTrie::free_resource(bool free_dict_list) {
     if (NULL != nodes_ge1_) free(nodes_ge1_);
     nodes_ge1_ = NULL;
 
-    if (NULL != nodes_ge1_) free(nodes_ge1_);
-    nodes_ge1_ = NULL;
+    if (NULL != lma_idx_buf_) free(lma_idx_buf_);
+    lma_idx_buf_ = NULL;
 
     if (free_dict_list) {
         if (NULL != dict_list_) {
diff --git a/src/share/userdict.cpp b/src/share/userdict.cpp
index ac6f08c..a3df536 100644
--- a/src/share/userdict.cpp
+++ b/src/share/userdict.cpp
@@ -336,6 +336,9 @@ out:
     free(offsets_by_id_);
     free(scores_);
     free(ids_);
+#ifdef ___SYNC_ENABLED___
+    free(syncs_);
+#endif
 #ifdef ___PREDICT_ENABLED___
     free(predicts_);
 #endif