diff --git a/changelog/updates/2026-10-12-linux-6.18.56-update.md b/changelog/updates/2026-10-12-linux-6.18.56-update.md
new file mode 100644
index 00000000000..09155be127d
--- /dev/null
+++ b/changelog/updates/2026-10-12-linux-6.18.56-update.md
@@ -0,0 +1 @@
+- Linux ([6.18.56](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.56) (includes [6.18.55](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.55), [6.18.54](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.54), [6.18.53](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.53), [6.18.52](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.52), [6.18.51](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.51), [6.18.50](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.50), [6.18.49](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.49), [6.18.48](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.48), [6.18.47](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.47), [6.18.46](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.18.46)))
diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.18.45.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.18.56.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.18.45.ebuild
rename to sdk_container/src/third_party/coreos-overlay/app-emulation/hv-daemons/hv-daemons-6.18.56.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.18.45.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.18.56.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.18.45.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.18.56.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.18.45.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.18.56.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.18.45.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/coreos-modules-6.18.56.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 34f33055170..5e7c8f6842c 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 +1,2 @@
 DIST linux-6.18.tar.xz 154309096 BLAKE2B b94b7b9bf18aca0c3e50baf79b009a1448fc6cd9c3ee019f641cc247dcf53a4abef4274ee0608ad8cd4943af69854363a95d26e117ff23620bb07dccb158859f SHA512 88599ffdec96d150c1feb9b261ba93bb0301a9d0e1ad6bef7aeab1f5372cbfc57d8b43c7e902bd8f76921d1dbd8189663c142ea869e51d0e2b483b150ee00fe0
-DIST patch-6.18.45.xz 3184312 BLAKE2B aba9fb2692dffd6815719605d067f67b78fe9d829ad41c7b235c3eef8b8259b0a7f48cf74ba71b7e485cb0fe33efc43dcd6bc5aa2d80f43965cc0319bee47dc6 SHA512 07cb6bc7d2ef0ce5ccfc2c68333d0490a452ba18063473e40ec458066f371e17b871edf937c517f318573bbe3836f0e62f21e3caa481051738a47d9eed858bfb
+DIST patch-6.18.56.xz 4622540 BLAKE2B a55629d145cfb6c4bf7780399423c96670595faa42f033f2a4ed7e011cc7d63683ab78a4d36eeecda5c681813d47dbae389a3e58e2e8cd44e116a74c94aeb61a SHA512 4c903ee382529a67a252baf76477683e1ed13e012a7d5215130ba8a7ff30672107369f7450a03233663ffcb930fdabc11c5e4423c7f5b5a3b5bc9adeab251271
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.18.45.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.18.56.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.18.45.ebuild
rename to sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-sources/coreos-sources-6.18.56.ebuild