diff --git a/.github/workflows/ci v2.yml b/.github/workflows/ci v2.yml
index fdb30831c..37d8b1fad 100644
--- a/.github/workflows/ci v2.yml	
+++ b/.github/workflows/ci v2.yml	
@@ -39,6 +39,11 @@ jobs:
           sudo apt-get purge -y g++-13 gcc-13 libstdc++-13-dev
           sudo apt-get install -y --allow-downgrades libstdc++-12-dev libstdc++6=12.* libgcc-s1=12.*
 
+    - shell: bash
+      run: |
+          # GH-40558: reduce ASLR to avoid ASAN/LSAN crashes
+          sudo sysctl -w vm.mmap_rnd_bits=28
+
     - name: Run CMake
       uses: lukka/run-cmake@v10
       with: