diff --git a/linux/linux.hash b/linux/linux.hash
index cab7b30385..e3047886c5 100644
--- a/linux/linux.hash
+++ b/linux/linux.hash
@@ -1,4 +1,5 @@
 # From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  ba3491f5ed6bd270a370c440434e3d69085fcdd528922fa01e73d7657db73b1e  linux-6.3.tar.xz
 sha256  c7dded14e368834b18bb2ad64af65560d8bcb9d2d6597e0f6ef151fded01e577  linux-6.2.13.tar.xz
 sha256  dfdcc143a879d64a5ee99213b2b4b05b5dccd566c144df93bca1e204df64c110  linux-6.1.26.tar.xz
 # From https://www.kernel.org/pub/linux/kernel/v5.x/sha256sums.asc
diff --git a/package/linux-headers/Config.in.host b/package/linux-headers/Config.in.host
index cb614d0eef..4a4f1308cb 100644
--- a/package/linux-headers/Config.in.host
+++ b/package/linux-headers/Config.in.host
@@ -3,7 +3,7 @@ comment "Kernel Header Options"
 choice
 	prompt "Kernel Headers"
 	default BR2_KERNEL_HEADERS_AS_KERNEL if BR2_LINUX_KERNEL
-	default BR2_KERNEL_HEADERS_6_2
+	default BR2_KERNEL_HEADERS_6_3
 	help
 	  Select the kernel version to get headers from.
 
@@ -52,6 +52,10 @@ config BR2_KERNEL_HEADERS_6_1
 config BR2_KERNEL_HEADERS_6_2
 	bool "Linux 6.2.x kernel headers"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
+
+config BR2_KERNEL_HEADERS_6_3
+	bool "Linux 6.3.x kernel headers"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
 	select BR2_KERNEL_HEADERS_LATEST
 
 config BR2_KERNEL_HEADERS_VERSION
@@ -129,8 +133,12 @@ choice
 	  If your kernel headers are more recent than the latest version
 	  in the choice, then select the latest version.
 
+config BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_3
+	bool "6.3.x or later"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
+
 config BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_2
-	bool "6.2.x or later"
+	bool "6.2.x"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
 
 config BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_1
@@ -399,6 +407,7 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "5.15.109"	if BR2_KERNEL_HEADERS_5_15
 	default "6.1.26"	if BR2_KERNEL_HEADERS_6_1
 	default "6.2.13"	if BR2_KERNEL_HEADERS_6_2
+	default "6.3"		if BR2_KERNEL_HEADERS_6_3
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION
 	default "custom"	if BR2_KERNEL_HEADERS_CUSTOM_TARBALL
 	default BR2_KERNEL_HEADERS_CUSTOM_REPO_VERSION \
diff --git a/toolchain/Config.in b/toolchain/Config.in
index 80b2dbde4d..ff0eb93017 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -604,6 +604,10 @@ config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_1
 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
 	bool
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_1
+
+config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
+	bool
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
 	select BR2_TOOLCHAIN_HEADERS_LATEST
 
 # This should be selected by the latest version, above, to indicate that
@@ -617,6 +621,7 @@ config BR2_TOOLCHAIN_HEADERS_LATEST
 # stops affecting a value on the first matching default.
 config BR2_TOOLCHAIN_HEADERS_AT_LEAST
 	string
+	default "6.3"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
 	default "6.2"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
 	default "6.1"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_1
 	default "6.0"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_0
diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
index 8f3905b8d7..0fd8841e5b 100644
--- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
+++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
@@ -127,8 +127,12 @@ choice
 	  If your toolchain uses headers newer than the latest version
 	  in the choice, then select the latest version.
 
+config BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_3
+	bool "6.3.x or later"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
+
 config BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_2
-	bool "6.2.x or later"
+	bool "6.2.x"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_2
 
 config BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_1