diff --git a/.github/workflows/bluetooth-tests.yaml b/.github/workflows/bluetooth-tests.yaml
index c3ef2d83ea941..85eae1728f628 100644
--- a/.github/workflows/bluetooth-tests.yaml
+++ b/.github/workflows/bluetooth-tests.yaml
@@ -23,12 +23,11 @@ jobs:
     runs-on: ubuntu-20.04
     needs: bluetooth-test-prep
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
     env:
       ZEPHYR_TOOLCHAIN_VARIANT: zephyr
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
       BSIM_OUT_PATH: /opt/bsim/
       BSIM_COMPONENTS_PATH: /opt/bsim/components
       EDTT_PATH: ../tools/edtt
diff --git a/.github/workflows/clang.yaml b/.github/workflows/clang.yaml
index d315d1daf49ed..e123ca10c5910 100644
--- a/.github/workflows/clang.yaml
+++ b/.github/workflows/clang.yaml
@@ -14,7 +14,7 @@ jobs:
     runs-on: zephyr_runner
     needs: clang-build-prep
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
       volumes:
         - /home/runners/zephyrproject:/github/cache/zephyrproject
@@ -24,7 +24,7 @@ jobs:
         platform: ["native_posix"]
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
+      LLVM_TOOLCHAIN_PATH: /usr/lib/llvm-15
       COMMIT_RANGE: ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}
       BASE_REF: ${{ github.base_ref }}
     outputs:
@@ -69,7 +69,7 @@ jobs:
       - name: Check Environment
         run: |
           cmake --version
-          ${CLANG_ROOT_DIR}/bin/clang --version
+          ${LLVM_TOOLCHAIN_PATH}/bin/clang --version
           gcc --version
           ls -la
 
diff --git a/.github/workflows/codecov.yaml b/.github/workflows/codecov.yaml
index a3011f9df4b45..3f7d6003f3a20 100644
--- a/.github/workflows/codecov.yaml
+++ b/.github/workflows/codecov.yaml
@@ -18,7 +18,7 @@ jobs:
     runs-on: zephyr_runner
     needs: codecov-prep
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
     strategy:
       fail-fast: false
@@ -26,7 +26,6 @@ jobs:
         platform: ["native_posix", "qemu_x86", "unit_testing"]
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
     steps:
       - name: Apply container owner mismatch workaround
         run: |
@@ -53,7 +52,6 @@ jobs:
       - name: Check Environment
         run: |
           cmake --version
-          ${CLANG_ROOT_DIR}/bin/clang --version
           gcc --version
           ls -la
       - name: Prepare ccache keys
diff --git a/.github/workflows/errno.yml b/.github/workflows/errno.yml
index 07c1724f35e03..6ad5f02f7f45d 100644
--- a/.github/workflows/errno.yml
+++ b/.github/workflows/errno.yml
@@ -10,7 +10,7 @@ jobs:
   check-errno:
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
 
diff --git a/.github/workflows/footprint-tracking.yml b/.github/workflows/footprint-tracking.yml
index a96de48f4d3e3..c195e300c2e33 100644
--- a/.github/workflows/footprint-tracking.yml
+++ b/.github/workflows/footprint-tracking.yml
@@ -27,13 +27,12 @@ jobs:
     if: github.repository == 'zephyrproject-rtos/zephyr'
     needs: footprint-tracking-cancel
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
     strategy:
       fail-fast: false
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
       ZEPHYR_TOOLCHAIN_VARIANT: zephyr
     steps:
       - name: Apply container owner mismatch workaround
diff --git a/.github/workflows/footprint.yml b/.github/workflows/footprint.yml
index a0943c1753b67..f2486e1eca165 100644
--- a/.github/workflows/footprint.yml
+++ b/.github/workflows/footprint.yml
@@ -16,13 +16,12 @@ jobs:
     if: github.repository == 'zephyrproject-rtos/zephyr'
     needs: footprint-cancel
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
     strategy:
       fail-fast: false
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
       ZEPHYR_TOOLCHAIN_VARIANT: zephyr
     steps:
       - name: Cancel Previous Runs
diff --git a/.github/workflows/twister.yaml b/.github/workflows/twister.yaml
index 9fc8271c165a4..267a45d8574ac 100644
--- a/.github/workflows/twister.yaml
+++ b/.github/workflows/twister.yaml
@@ -27,7 +27,7 @@ jobs:
     runs-on: zephyr_runner
     needs: twister-build-cleanup
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
       volumes:
         - /home/runners/zephyrproject:/github/cache/zephyrproject
@@ -40,7 +40,6 @@ jobs:
       PUSH_MATRIX_SIZE: 15
       DAILY_MATRIX_SIZE: 80
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
       TESTS_PER_BUILDER: 700
       COMMIT_RANGE: ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}
       BASE_REF: ${{ github.base_ref }}
@@ -120,7 +119,7 @@ jobs:
     needs: twister-build-prep
     if: needs.twister-build-prep.outputs.size != 0
     container:
-      image: ghcr.io/zephyrproject-rtos/ci:v0.24.2
+      image: ghcr.io/zephyrproject-rtos/ci:v0.24.3
       options: '--entrypoint /bin/bash'
       volumes:
         - /home/runners/zephyrproject:/github/cache/zephyrproject
@@ -130,7 +129,6 @@ jobs:
         subset: ${{fromJSON(needs.twister-build-prep.outputs.subset)}}
     env:
       ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.15.0
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
       TWISTER_COMMON: ' --force-color --inline-logs -v -N -M --retry-failed 3 '
       DAILY_OPTIONS: ' -M --build-only --all'
       PR_OPTIONS: ' --clobber-output --integration'
@@ -177,7 +175,6 @@ jobs:
       - name: Check Environment
         run: |
           cmake --version
-          ${CLANG_ROOT_DIR}/bin/clang --version
           gcc --version
           ls -la
           echo "github.ref: ${{ github.ref }}"
diff --git a/cmake/compiler/clang/compiler_flags.cmake b/cmake/compiler/clang/compiler_flags.cmake
index f4d5a6530173f..ce0c8b17fe966 100644
--- a/cmake/compiler/clang/compiler_flags.cmake
+++ b/cmake/compiler/clang/compiler_flags.cmake
@@ -29,6 +29,7 @@ check_set_compiler_property(PROPERTY warning_base
                             -Wno-main
                             -Wno-unused-but-set-variable
                             -Wno-typedef-redefinition
+                            -Wno-deprecated-non-prototype
 )
 
 check_set_compiler_property(APPEND PROPERTY warning_base -Wno-pointer-sign)