diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index f91ac03066..95d993ec42 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -34,5 +34,8 @@ jobs:
     steps:
       - name: Repository checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+      # FIXME: drop once https://github.com/actions/runner-images/issues/9491  is resolved
+      - name: Reduce ASLR entropy
+        run: sudo sysctl -w vm.mmap_rnd_bits=28
       - name: Build check
         run: .github/workflows/build_test.sh
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index d2164cc576..2c0cbba356 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -31,6 +31,9 @@ jobs:
     steps:
       - name: Repository checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+      # FIXME: drop once https://github.com/actions/runner-images/issues/9491  is resolved
+      - name: Reduce ASLR entropy
+        run: sudo sysctl -w vm.mmap_rnd_bits=28
       - name: Install build dependencies
         run: |
           # Drop XDG_* stuff from /etc/environment, so we don't get the user