diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 49ebfe55..da885f13 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -9,3 +9,10 @@ updates:
         patterns:
           - "*"
     open-pull-requests-limit: 2
+    ignore:
+      # HOLD: github/codeql-action at v4.38.0 (SHA-pinned). v4.38.1 fails
+      # GitHub workflow-startup validation estate-wide (nexia-list#100;
+      # SHA-form re-bump bypassed versions-scoped ignores - nexia-list#101).
+      # Hold until upstream clears 4.38.1 or a new release verifies green.
+      - dependency-name: "github/codeql-action"
+
diff --git a/.github/workflows/actions.lock b/.github/workflows/actions.lock
index 9985bb06..79f85db0 100644
--- a/.github/workflows/actions.lock
+++ b/.github/workflows/actions.lock
@@ -7,7 +7,7 @@ workflows:
         - 'actions/checkout@v7.0.1'
     '.github/workflows/codeql.yml':
         - 'actions/checkout@v7.0.1'
-        - 'github/codeql-action@v4.38.1'
+        - 'github/codeql-action@b96794f015dfd88f77b49b1c93e0fa7110f94c63'
     '.github/workflows/coq-build.yml':
         - 'actions/checkout@v7.0.1'
     '.github/workflows/ffi-seams.yml':
@@ -93,9 +93,9 @@ dependencies:
         commit: 'sha1-db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28'
         owner_id: 9919
         repo_id: 259445878
-    'github/codeql-action@v4.38.1':
-        ref: 'v4.38.1'
-        commit: 'sha1-1c5b675653bb5c22dbe9b12b556ec555138e09fd'
+    'github/codeql-action@b96794f015dfd88f77b49b1c93e0fa7110f94c63':
+        ref: 'b96794f015dfd88f77b49b1c93e0fa7110f94c63'
+        commit: 'sha1-b96794f015dfd88f77b49b1c93e0fa7110f94c63'
         owner_id: 9919
         repo_id: 259445878
     'goto-bus-stop/setup-zig@abea47f85e598557f500fa1fd2ab7464fcb39406':
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 73331c9e..57ddf776 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -43,12 +43,12 @@ jobs:
         uses: actions/checkout@v7.0.1
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v4.38.1
+        uses: github/codeql-action/init@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4.38.0 (4.38.1 blocked estate-wide; nexia-list#100)
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v4.38.1
+        uses: github/codeql-action/analyze@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4.38.0 (4.38.1 blocked estate-wide; nexia-list#100)
         with:
           category: "/language:${{ matrix.language }}"