diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 35d5ed304..add5732ba 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -6,6 +6,9 @@ on:
   workflow_dispatch:
   schedule:
     - cron: '0 4 * * *'
+  pull_request:
+    paths:
+      - '.github/workflows/nightly.yml'
 
 permissions:
   contents: read
@@ -484,9 +487,9 @@ jobs:
     uses: ./.github/workflows/reusable_qemu.yml
     with:
       short_run: false
-      # Beside the 2 LTS Ubuntu, we also test this on the latest Ubuntu -  to be updated
-      # every 6 months, so we verify the latest version of packages (compilers, etc.).
-      os: "['ubuntu-22.04', 'ubuntu-24.04', 'ubuntu-25.04']"
+      # Test it on 3 LTS Ubuntu images, we may also test this on some latest Ubuntu,
+      # so we could verify the newest version of packages (compilers, etc.).
+      os: "['ubuntu-22.04', 'ubuntu-24.04', 'ubuntu-26.04']"
 
   Benchmarks:
     uses: ./.github/workflows/reusable_benchmarks.yml
diff --git a/.github/workflows/reusable_compatibility.yml b/.github/workflows/reusable_compatibility.yml
index 4640d8d50..136348858 100644
--- a/.github/workflows/reusable_compatibility.yml
+++ b/.github/workflows/reusable_compatibility.yml
@@ -20,7 +20,7 @@ permissions:
 jobs:
   ubuntu:
     name: Ubuntu
-    runs-on: 'ubuntu-22.04'
+    runs-on: 'ubuntu-24.04'
 
     steps:
     - name: Install apt packages
diff --git a/.github/workflows/reusable_dockers_build.yml b/.github/workflows/reusable_dockers_build.yml
index ebe4dabf4..1d1d19f70 100644
--- a/.github/workflows/reusable_dockers_build.yml
+++ b/.github/workflows/reusable_dockers_build.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy: 
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04, ubuntu-26.04]
     env:
       IMG: ghcr.io/bb-ur/umf-${{ matrix.os }}:latest
     permissions:
diff --git a/.github/workflows/reusable_proxy_lib.yml b/.github/workflows/reusable_proxy_lib.yml
index 8e987af3f..c276ac2ae 100644
--- a/.github/workflows/reusable_proxy_lib.yml
+++ b/.github/workflows/reusable_proxy_lib.yml
@@ -19,8 +19,8 @@ jobs:
         build_type: [Release, Debug]
         compiler: [{c: gcc, cxx: g++}]
         proxy_lib_pool: ['SCALABLE', 'JEMALLOC']
-    name: Proxy Library (ubuntu-22.04, build_type=${{matrix.build_type}}, compilers=${{matrix.compiler.c}}/${{matrix.compiler.cxx}}, proxy_lib_pool=${{matrix.proxy_lib_pool}})
-    runs-on: ${{ github.repository_owner == 'oneapi-src' && 'intel-ubuntu-22.04' || 'ubuntu-22.04' }}
+    name: Proxy Library (ubuntu-24.04, build_type=${{matrix.build_type}}, compilers=${{matrix.compiler.c}}/${{matrix.compiler.cxx}}, proxy_lib_pool=${{matrix.proxy_lib_pool}})
+    runs-on: ${{ github.repository_owner == 'oneapi-src' && 'intel-ubuntu-24.04' || 'ubuntu-24.04' }}
 
     steps:
       - name: Checkout
diff --git a/.github/workflows/reusable_qemu.yml b/.github/workflows/reusable_qemu.yml
index 8da1c459e..40f8223e6 100644
--- a/.github/workflows/reusable_qemu.yml
+++ b/.github/workflows/reusable_qemu.yml
@@ -24,7 +24,7 @@ jobs:
     name: QEMU (${{ matrix.os }})
 
     # Host QEMU on any Linux platform
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - name: Checkout UMF
diff --git a/.github/workflows/reusable_sanitizers.yml b/.github/workflows/reusable_sanitizers.yml
index ca7b58404..d49ae0d88 100644
--- a/.github/workflows/reusable_sanitizers.yml
+++ b/.github/workflows/reusable_sanitizers.yml
@@ -17,8 +17,8 @@ jobs:
         compiler: [{c: gcc, cxx: g++}, {c: clang, cxx: clang++}, {c: icx, cxx: icpx}]
         # TSAN is mutually exclusive with other sanitizers
         sanitizers: [{asan: ON, ubsan: ON, tsan: OFF}, {asan: OFF, ubsan: OFF, tsan: ON}]
-    name: Sanitizers (ubuntu-22.04, compilers=${{matrix.compiler.c}}/${{matrix.compiler.cxx}}, asan=${{matrix.sanitizers.asan}}, ubsan=${{matrix.sanitizers.ubsan}}, tsan=${{matrix.sanitizers.tsan}})
-    runs-on: ubuntu-22.04
+    name: Sanitizers (ubuntu-24.04, compilers=${{matrix.compiler.c}}/${{matrix.compiler.cxx}}, asan=${{matrix.sanitizers.asan}}, ubsan=${{matrix.sanitizers.ubsan}}, tsan=${{matrix.sanitizers.tsan}})
+    runs-on: ubuntu-24.04
 
     steps:
     - name: Checkout
diff --git a/.github/workflows/weekly.yml b/.github/workflows/weekly.yml
index 740cdfce8..485af3465 100644
--- a/.github/workflows/weekly.yml
+++ b/.github/workflows/weekly.yml
@@ -6,6 +6,9 @@ on:
   workflow_dispatch:
   schedule:
     - cron: '0 1 * * 6' # every Saturday at 01:00 UTC
+  pull_request:
+    paths:
+      - '.github/workflows/weekly.yml'
 
 env:
   BUILD_DIR : "${{github.workspace}}/build"
@@ -25,7 +28,7 @@ jobs:
         compiler: [{c: gcc, cxx: g++}, {c: clang, cxx: clang++}, {c: icx, cxx: icpx}]
         # TSAN is mutually exclusive with other sanitizers
         sanitizers: [{asan: ON, ubsan: ON, tsan: OFF}, {asan: OFF, ubsan: OFF, tsan: ON}]
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - name: Checkout