diff --git a/linux/linux.hash b/linux/linux.hash
index 78d1395e66..7b56d19cb5 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  d926a06c63dd8ac7df3f86ee1ffc2ce2a3b81a2d168484e76b5b389aba8e56d0  linux-6.6.tar.xz
 sha256  c6662f64713f56bf30e009c32eac15536fad5fd1c02e8a3daf62a0dc2f058fd5  linux-6.5.9.tar.xz
 sha256  58520e7ae5a6af254ddf7ddbfc42e4373b0d36c67d467f6e35a3bd1672f5fb0a  linux-6.1.60.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 bb624147ec..74d445ff27 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_5
+	default BR2_KERNEL_HEADERS_6_6
 	help
 	  Select the kernel version to get headers from.
 
@@ -52,6 +52,10 @@ config BR2_KERNEL_HEADERS_6_1
 config BR2_KERNEL_HEADERS_6_5
 	bool "Linux 6.5.x kernel headers"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
+
+config BR2_KERNEL_HEADERS_6_6
+	bool "Linux 6.6.x kernel headers"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_6
 	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_6
+	bool "6.6.x or later"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_6
+
 config BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_5
-	bool "6.5.x or later"
+	bool "6.5.x"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
 
 config BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_4
@@ -411,6 +419,7 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "5.15.137"	if BR2_KERNEL_HEADERS_5_15
 	default "6.1.60"	if BR2_KERNEL_HEADERS_6_1
 	default "6.5.9"		if BR2_KERNEL_HEADERS_6_5
+	default "6.6"		if BR2_KERNEL_HEADERS_6_6
 	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 d8081f1b9d..34e0ae2c5f 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -640,6 +640,10 @@ config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_4
 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
 	bool
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_4
+
+config BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_6
+	bool
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
 	select BR2_TOOLCHAIN_HEADERS_LATEST
 
 # This should be selected by the latest version, above, to indicate that
@@ -653,6 +657,7 @@ config BR2_TOOLCHAIN_HEADERS_LATEST
 # stops affecting a value on the first matching default.
 config BR2_TOOLCHAIN_HEADERS_AT_LEAST
 	string
+	default "6.6"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_6
 	default "6.5"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
 	default "6.4"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_4
 	default "6.3"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_3
diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
index 556ca7a642..5554d56719 100644
--- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
+++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
@@ -162,8 +162,12 @@ 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_6
+	bool "6.6.x or later"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_6
+
 config BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_5
-	bool "6.5.x or later"
+	bool "6.5.x"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_5
 
 config BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_4