diff --git a/build_library/qemu_template.sh b/build_library/qemu_template.sh
index 967b95d1010..4e2d5266f3d 100755
--- a/build_library/qemu_template.sh
+++ b/build_library/qemu_template.sh
@@ -19,6 +19,7 @@ IGNITION_CONFIG_FILE=""
 CONFIG_IMAGE=""
 SWTPM_DIR=
 SAFE_ARGS=0
+FORWARDED_PORTS=""
 USAGE="Usage: $0 [-a authorized_keys] [--] [qemu options...]
 Options:
     -i FILE     File containing an Ignition config
@@ -28,6 +29,7 @@ Options:
     -a FILE     SSH public keys for login access. [~/.ssh/id_{dsa,rsa}.pub]
     -p PORT     The port on localhost to map to the VM's sshd. [2222]
     -I FILE     Set a custom image file.
+    -f PORT     Forward host_port:guest_port.
     -M MB       Set VM memory in MBs.
     -T DIR      Add a software TPM2 device through swtpm which stores secrets
                 and the control socket to the given directory. This may need
@@ -84,6 +86,9 @@ while [ $# -ge 1 ]; do
         -p|-ssh-port)
             SSH_PORT="$2"
             shift 2 ;;
+        -f|-forward-port)
+            FORWARDED_PORTS="${FORWARDED_PORTS} $2"
+            shift 2 ;;
         -s|-safe)
             SAFE_ARGS=1
             shift ;;
@@ -203,6 +208,15 @@ if [ -z "${CONFIG_IMAGE}" ]; then
     fi
 fi
 
+# Process port forwards
+QEMU_FORWARDED_PORTS=""
+for port in ${FORWARDED_PORTS}; do
+    host_port=${port%:*}
+    guest_port=${port#*:}
+    QEMU_FORWARDED_PORTS="${QEMU_FORWARDED_PORTS},hostfwd=tcp::${host_port}-:${guest_port}"
+done
+QEMU_FORWARDED_PORTS="${QEMU_FORWARDED_PORTS#,}"
+
 # Start assembling our default command line arguments
 if [ "${SAFE_ARGS}" -eq 1 ]; then
     # Disable KVM, for testing things like UEFI which don't like it
@@ -288,7 +302,7 @@ case "${VM_BOARD}" in
         qemu-system-x86_64 \
             -name "$VM_NAME" \
             -m ${VM_MEMORY} \
-            -netdev user,id=eth0,hostfwd=tcp::"${SSH_PORT}"-:22,hostname="${VM_NAME}" \
+            -netdev user,id=eth0${QEMU_FORWARDED_PORTS:+,}${QEMU_FORWARDED_PORTS},hostfwd=tcp::"${SSH_PORT}"-:22,hostname="${VM_NAME}" \
             -device virtio-net-pci,netdev=eth0 \
             -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 \
             "$@"
@@ -297,7 +311,7 @@ case "${VM_BOARD}" in
         qemu-system-aarch64 \
             -name "$VM_NAME" \
             -m ${VM_MEMORY} \
-            -netdev user,id=eth0,hostfwd=tcp::"${SSH_PORT}"-:22,hostname="${VM_NAME}" \
+            -netdev user,id=eth0${QEMU_FORWARDED_PORTS:+,}${QEMU_FORWARDED_PORTS},hostfwd=tcp::"${SSH_PORT}"-:22,hostname="${VM_NAME}" \
             -device virtio-net-device,netdev=eth0 \
             -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 \
             "$@"
diff --git a/changelog/bugfixes/2025-01-15-qemu-startup-script-comma-fix.md b/changelog/bugfixes/2025-01-15-qemu-startup-script-comma-fix.md
new file mode 100644
index 00000000000..04e2658ecab
--- /dev/null
+++ b/changelog/bugfixes/2025-01-15-qemu-startup-script-comma-fix.md
@@ -0,0 +1 @@
+- Fixed creating netdev arguments to correctly include commas when no port forwards are passed ([flatcar/scripts#2581](https://github.com/flatcar/scripts/pull/2581))
diff --git a/changelog/changes/2025-01-10-qemu-startup-script-port-forwarding.md b/changelog/changes/2025-01-10-qemu-startup-script-port-forwarding.md
new file mode 100644
index 00000000000..302b4d84c11
--- /dev/null
+++ b/changelog/changes/2025-01-10-qemu-startup-script-port-forwarding.md
@@ -0,0 +1 @@
+- Added support for multiple port forwarding parameters in the QEMU startup script. Users can now specify multiple port forwards using the `-f` option. ([flatcar/scripts#2575](https://github.com/flatcar/scripts/pull/2575))
diff --git a/changelog/updates/2025-01-11-linux-6.6.71-update.md b/changelog/updates/2025-01-11-linux-6.6.71-update.md
new file mode 100644
index 00000000000..1c920309f7b
--- /dev/null
+++ b/changelog/updates/2025-01-11-linux-6.6.71-update.md
@@ -0,0 +1 @@
+- Linux ([6.6.71](https://lwn.net/Articles/1004703) (includes [6.6.70](https://lwn.net/Articles/1004551)))
diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index b4d98054b8d..135046985a7 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=4211.0.0+nightly-20250110-2100
-FLATCAR_VERSION_ID=4211.0.0
-FLATCAR_BUILD_ID="nightly-20250110-2100"
-FLATCAR_SDK_VERSION=4211.0.0+nightly-20250110-2100
+FLATCAR_VERSION=4216.0.0+nightly-20250115-2100
+FLATCAR_VERSION_ID=4216.0.0
+FLATCAR_BUILD_ID="nightly-20250115-2100"
+FLATCAR_SDK_VERSION=4216.0.0+nightly-20250115-2100
diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.6.69.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.6.71.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.6.69.ebuild
rename to sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.6.71.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.6.69.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.6.71.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.6.69.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.6.71.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.6.69.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.6.71.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.6.69.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.6.71.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/Manifest b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/Manifest
index fb4e7fbee0a..1665932d7ad 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/Manifest
+++ b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/Manifest
@@ -1,2 +1 @@
 DIST linux-6.12.tar.xz 147906904 BLAKE2B b2ec2fc69218cacabbbe49f78384a5d259ca581b717617c12b000b16f4a4c59ee348ea886b37147f5f70fb9a7a01c1e2c8f19021078f6b23f5bc62d1c48d5e5e SHA512 a37b1823df7b4f72542f689b65882634740ba0401a42fdcf6601d9efd2e132e5a7650e70450ba76f6cd1f13ca31180f2ccee9d54fe4df89bc0000ade4380a548
-
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.6.69.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.6.71.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.6.69.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.6.71.ebuild