diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 280d8de618e1..3fe870b3b4e1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -466,9 +466,10 @@ jobs:
         - name: linux_nvcc-11.1_gcc-9_release
           os: ubuntu-latest
           env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 9,        ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Release, ALPAKA_CI_BOOST_BRANCH: boost-1.69.0, ALPAKA_CI_CMAKE_VER: 3.19.7,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.1", ALPAKA_CUDA_COMPILER: nvcc,                                                ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
-        - name: linux_nvcc-11.1_gcc-10_debug
-          os: ubuntu-latest
-          env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 10,       ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_CI_BOOST_BRANCH: boost-1.73.0, ALPAKA_CI_CMAKE_VER: 3.16.9,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.1", ALPAKA_CUDA_COMPILER: nvcc, ALPAKA_CUDA_ARCH: "86",                        ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
+        # disabled because of an GCC 10.3 bug: https://github.com/alpaka-group/alpaka/issues/1297
+        # name: linux_nvcc-11.1_gcc-10_debug
+        #  os: ubuntu-latest
+        #  env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 10,       ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_CI_BOOST_BRANCH: boost-1.73.0, ALPAKA_CI_CMAKE_VER: 3.16.9,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.1", ALPAKA_CUDA_COMPILER: nvcc, ALPAKA_CUDA_ARCH: "86",                        ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
         # nvcc + clang++
         - name: linux_nvcc-11.1_clang-4_release
           os: ubuntu-latest
@@ -509,9 +510,10 @@ jobs:
         - name: linux_nvcc-11.2_gcc-9_release
           os: ubuntu-latest
           env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 9,        ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Release, ALPAKA_CI_BOOST_BRANCH: boost-1.69.0, ALPAKA_CI_CMAKE_VER: 3.19.7,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.2", ALPAKA_CUDA_COMPILER: nvcc,                                                ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
-        - name: linux_nvcc-11.2_gcc-10_debug
-          os: ubuntu-latest
-          env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 10,       ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_CI_BOOST_BRANCH: boost-1.73.0, ALPAKA_CI_CMAKE_VER: 3.20.0,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.2", ALPAKA_CUDA_COMPILER: nvcc, ALPAKA_CUDA_ARCH: "86",                        ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
+        # disabled because of an GCC 10.3 bug: https://github.com/alpaka-group/alpaka/issues/1297
+        # name: linux_nvcc-11.2_gcc-10_debug
+        #  os: ubuntu-latest
+        #  env: {CXX: g++,     CC: gcc,    ALPAKA_CI_GCC_VER: 10,       ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_CI_BOOST_BRANCH: boost-1.73.0, ALPAKA_CI_CMAKE_VER: 3.20.0,                     ALPAKA_CI_DOCKER_BASE_IMAGE_NAME: "ubuntu:18.04", ALPAKA_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CUDA_VERSION: "11.2", ALPAKA_CUDA_COMPILER: nvcc, ALPAKA_CUDA_ARCH: "86",                        ALPAKA_ACC_CPU_B_SEQ_T_FIBERS_ENABLE: OFF}
         # nvcc + clang++
         - name: linux_nvcc-11.2_clang-4_release
           os: ubuntu-latest
diff --git a/README.md b/README.md
index 590bb00057bb..fe28e421c181 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ Supported Compilers
 
 This library uses C++14 (or newer when available).
 
-|Accelerator Back-end|gcc 5.5 <br/> (Linux)|gcc 6.4/7.3 <br/> (Linux)|gcc 8.1 <br/> (Linux)|gcc 9.1 <br/> (Linux)|gcc 10.1 <br/> (Linux)|clang 4 <br/> (Linux)|clang 5 <br/> (Linux)|clang 6 <br/> (Linux)|clang 7 <br/> (Linux)|clang 8 <br/> (Linux)|clang 9 <br/> (Linux)|clang 10 <br/> (Linux)|clang 12 <br/> (Linux)|Apple LLVM 11.2.1-12.2.0 <br/> (macOS)|MSVC 2019 <br/> (Windows)|
+|Accelerator Back-end|gcc 5.5 <br/> (Linux)|gcc 6.4/7.3 <br/> (Linux)|gcc 8.1 <br/> (Linux)|gcc 9.1 <br/> (Linux)|gcc 10.3 <br/> (Linux)|clang 4 <br/> (Linux)|clang 5 <br/> (Linux)|clang 6 <br/> (Linux)|clang 7 <br/> (Linux)|clang 8 <br/> (Linux)|clang 9 <br/> (Linux)|clang 10 <br/> (Linux)|clang 12 <br/> (Linux)|Apple LLVM 11.2.1-12.2.0 <br/> (macOS)|MSVC 2019 <br/> (Windows)|
 |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |Serial|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:white_check_mark:|:white_check_mark:|
 |OpenMP 2.0+ blocks|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:x:|:white_check_mark:|
@@ -79,7 +79,7 @@ This library uses C++14 (or newer when available).
 | std::thread |:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:white_check_mark:|:white_check_mark:|
 | Boost.Fiber |:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:x:|:white_check_mark:|
 |TBB|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:white_check_mark:|:x:|
-|CUDA (nvcc)|:white_check_mark: <br/> (CUDA 9.0-11.2)|:white_check_mark: <br/> (CUDA 9.2-11.2) |:white_check_mark: <br/> (CUDA 10.1-11.2) |:white_check_mark: <br/> (CUDA 11.0-11.2)|:white_check_mark: <br/> (CUDA 11.1-CUDA 11.2)|:white_check_mark: <br/> (CUDA 9.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 11.0-11.2)|:white_check_mark: <br/> (CUDA 11.2)| - |:x:|:white_check_mark: <br/> (CUDA 10.1-11.2)|
+|CUDA (nvcc)|:white_check_mark: <br/> (CUDA 9.0-11.2)|:white_check_mark: <br/> (CUDA 9.2-11.2) |:white_check_mark: <br/> (CUDA 10.1-11.2) |:white_check_mark: <br/> (CUDA 11.0-11.2)|:white_check_mark: <br/> (CUDA 11.1-CUDA 11.0)|:white_check_mark: <br/> (CUDA 9.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 10.1-11.2)|:white_check_mark: <br/> (CUDA 11.0-11.2)|:white_check_mark: <br/> (CUDA 11.2)| - |:x:|:white_check_mark: <br/> (CUDA 10.1-11.2)|
 |CUDA (clang) | - | - | - | - | - | - | - | :white_check_mark: <br/> (CUDA 9.0) | :white_check_mark: <br/> (CUDA 9.0-9.2) | :white_check_mark: <br/> (CUDA 9.0-10.0) | :white_check_mark: <br/> (CUDA 9.2-10.1) | :white_check_mark: <br/> (CUDA 9.2-10.1) | - | - | - |
 |[HIP-4.0.1](https://alpaka.readthedocs.io/en/latest/install/HIP.html) (clang)|:x: |:x:|:x:|:x:|:x:|:x:|:x:|:x:|:x:|:x:|:x:|:x:|:white_check_mark:| - | - |