diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index becfa6d45ba11..d252cb0fb0dbb 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -8,6 +8,10 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 <!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->
 
+- Core version changes:
+
+  - default linux: 6.1 -\> 6.6, all supported kernels available
+
 - `cryptsetup` has been upgraded from 2.6.1 to 2.7.0. Cryptsetup is a critical component enabling LUKS-based (but not only) full disk encryption.
   Take the time to review [the release notes](https://gitlab.com/cryptsetup/cryptsetup/-/raw/v2.7.0/docs/v2.7.0-ReleaseNotes).
   One of the highlight is that it is now possible to use hardware OPAL-based encryption of your disk with `cryptsetup`, it has a lot of caveats, see the above notes for the full details.
diff --git a/pkgs/top-level/linux-kernels.nix b/pkgs/top-level/linux-kernels.nix
index 62caa91bd496c..3931ba8210d17 100644
--- a/pkgs/top-level/linux-kernels.nix
+++ b/pkgs/top-level/linux-kernels.nix
@@ -658,7 +658,7 @@ in {
   });
 
   packageAliases = {
-    linux_default = packages.linux_6_1;
+    linux_default = packages.linux_6_6;
     # Update this when adding the newest kernel major version!
     linux_latest = packages.linux_6_7;
     linux_mptcp = throw "'linux_mptcp' has been moved to https://github.com/teto/mptcp-flake";