22.0.0: Difference between revisions

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The Switch 22.0.0 system update was released on March 17, 2026 (UTC). This Switch update was released for the following regions: ALL.

Security flaws fixed: ~~<fill~~ this ~~in manually>~~.

Security flaws fixed: yes.

As of roughly March 31 - April 2, 2026 (UTC), this sysupdate is now required by dauth.

==Change-log==

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==== Kernel ====

* Compiler update (Clang 20?)

* KProcess::Run() and CreateThread() SVC now write the current thread handle to [[Thread_Local_Region|TLS+0x110]]

* Changes in and surrounding page table logic:

** KPageTableBase::LockForMapDeviceAddressSpace now checks for a new KPageTableBase boolean, m_allowed_exec_device_mapping, and decides between KMemoryPermission_None and KMemoryPermission_UserExecute for the permission mask value if the boolean is, respectively, set or not.

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A new NSO compression method was introduced.

This ~~appears to be~~ a ~~custom~~ variant of zstd and is used when NSO [[NSO0#Flags|flags]] have bit 7 set.

This is a customized variant of zstd and is used when NSO [[NSO0#Flags|flags]] have bit 7 set.

* ZSTD_MAGICNUMBER is set to 0x4349425A (b'ZBIC') instead of standard 0xFD2FB528

* ZSTD_LEGACY_SUPPORT is set to 0

* ZSTD_TRACE is set to 1, the version of zstd used is 1.5.7 (ZSTD_VERSION_NUMBER = 10507)

* FSE_readNCount is replaced with a BIC (Binary Interpolative Coding) version which improves compression of entropy tables significantly

=== [[NFC_services|nfc]] ===

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 The Switch 22.0.0 system update was released on March 17, 2026 (UTC). This Switch update was released for the following regions: ALL.
-Security flaws fixed: <fill this in manually>.
+Security flaws fixed: yes.
+As of roughly March 31 - April 2, 2026 (UTC), this sysupdate is now required by dauth.
 ==Change-log==
@@ Line 209: / Line 211: @@
 ==== Kernel ====
+* Compiler update (Clang 20?)
+* KProcess::Run() and CreateThread() SVC now write the current thread handle to [[Thread_Local_Region|TLS+0x110]]
 * Changes in and surrounding page table logic:
 ** KPageTableBase::LockForMapDeviceAddressSpace now checks for a new KPageTableBase boolean, m_allowed_exec_device_mapping, and decides between KMemoryPermission_None and KMemoryPermission_UserExecute for the permission mask value if the boolean is, respectively, set or not.
@@ Line 217: / Line 221: @@
 A new NSO compression method was introduced.
-This appears to be a custom variant of zstd and is used when NSO [[NSO0#Flags|flags]] have bit 7 set.
+This is a customized variant of zstd and is used when NSO [[NSO0#Flags|flags]] have bit 7 set.
+* ZSTD_MAGICNUMBER is set to 0x4349425A (b'ZBIC') instead of standard 0xFD2FB528
+* ZSTD_LEGACY_SUPPORT is set to 0
+* ZSTD_TRACE is set to 1, the version of zstd used is 1.5.7 (ZSTD_VERSION_NUMBER = 10507)
+* FSE_readNCount is replaced with a BIC (Binary Interpolative Coding) version which improves compression of entropy tables significantly
 === [[NFC_services|nfc]] ===