diff --git a/configs/qemu_ppc64_e5500_defconfig b/configs/qemu_ppc64_e5500_defconfig
index dace0af8ee..286d79a26b 100644
--- a/configs/qemu_ppc64_e5500_defconfig
+++ b/configs/qemu_ppc64_e5500_defconfig
@@ -10,12 +10,12 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
 # Linux headers same as the kernel
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_DEFCONFIG="corenet64_smp"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/qemu/ppc64-e5500/linux.fragment"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
diff --git a/configs/qemu_ppc64_pseries_defconfig b/configs/qemu_ppc64_pseries_defconfig
index 4ce116e26a..1a20e2ee0e 100644
--- a/configs/qemu_ppc64_pseries_defconfig
+++ b/configs/qemu_ppc64_pseries_defconfig
@@ -14,13 +14,13 @@ BR2_TARGET_ROOTFS_EXT2=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
-# Linux headers same as kernel, a 5.10 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+# Linux headers same as kernel
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_DEFCONFIG="pseries"
 BR2_LINUX_KERNEL_VMLINUX=y
 
diff --git a/configs/qemu_ppc64le_pseries_defconfig b/configs/qemu_ppc64le_pseries_defconfig
index 3be9de74a6..46f62b8313 100644
--- a/configs/qemu_ppc64le_pseries_defconfig
+++ b/configs/qemu_ppc64le_pseries_defconfig
@@ -14,13 +14,13 @@ BR2_TARGET_ROOTFS_EXT2=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
-# Linux headers same as kernel, a 5.10 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+# Linux headers same as kernel
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_DEFCONFIG="pseries_le"
 BR2_LINUX_KERNEL_VMLINUX=y
 
diff --git a/configs/qemu_ppc_e500mc_defconfig b/configs/qemu_ppc_e500mc_defconfig
index 69fc8dbc06..1a5b1e3c2c 100644
--- a/configs/qemu_ppc_e500mc_defconfig
+++ b/configs/qemu_ppc_e500mc_defconfig
@@ -10,12 +10,12 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
 # Linux headers same as the kernel
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_DEFCONFIG="corenet32_smp"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/qemu/ppc-e500mc/linux.fragment"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
diff --git a/configs/qemu_ppc_mac99_defconfig b/configs/qemu_ppc_mac99_defconfig
index a1e9c1a5a6..ddeb99465a 100644
--- a/configs/qemu_ppc_mac99_defconfig
+++ b/configs/qemu_ppc_mac99_defconfig
@@ -5,13 +5,13 @@ BR2_powerpc_7400=y
 # System
 BR2_SYSTEM_DHCP="eth0"
 
-# Linux headers same as kernel, a 5.10 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+# Linux headers same as kernel
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_DEFCONFIG="pmac32"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/qemu/ppc-mac99/linux.fragment"
 BR2_LINUX_KERNEL_VMLINUX=y
diff --git a/configs/qemu_ppc_mpc8544ds_defconfig b/configs/qemu_ppc_mpc8544ds_defconfig
index 55e6db5a0d..1a72d81ed5 100644
--- a/configs/qemu_ppc_mpc8544ds_defconfig
+++ b/configs/qemu_ppc_mpc8544ds_defconfig
@@ -14,13 +14,13 @@ BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 
-# Linux headers same as kernel, a 5.10 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+# Linux headers same as kernel
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/ppc-mpc8544ds/linux.config"
 BR2_LINUX_KERNEL_VMLINUX=y