diff --git a/Directory.Build.props b/Directory.Build.props
index 40c75f103b8be8..c6bae2a825b1bf 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -184,7 +184,9 @@
     <TestExclusionListTasksAssemblyPath>$([MSBuild]::NormalizePath('$(TestExclusionListTasksDir)', 'TestExclusionListTasks.dll'))</TestExclusionListTasksAssemblyPath>
     <CoreCLRToolPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'coreclr', '$(TargetOS).$(TargetArchitecture).$(RuntimeConfiguration)'))</CoreCLRToolPath>
     <ILAsmToolPath Condition="'$(DotNetBuildSourceOnly)' == 'true' or '$(BuildArchitecture)' == 's390x' or '$(BuildArchitecture)' == 'ppc64le'">$(CoreCLRToolPath)</ILAsmToolPath>
+    <!-- force download temmporarily https://github.com/dotnet/runtime/issues/101528
     <WasmtimeDir Condition="'$(WasmtimeDir)' == '' and '$(WASMTIME_PATH)' != '' and Exists($(WASMTIME_PATH))">$(WASMTIME_PATH)</WasmtimeDir>
+    -->
     <WasmtimeDir Condition="'$(WasmtimeDir)' == ''">$([MSBuild]::NormalizeDirectory($(ArtifactsObjDir), 'wasmtime'))</WasmtimeDir>
     <InstallWasmtimeForTests Condition="'$(InstallWasmtimeForTests)' == '' and !Exists($(WasmtimeDir))">true</InstallWasmtimeForTests>
     <WasmCommonTargetsPath>$([MSBuild]::NormalizeDirectory($(WasmProjectRoot), 'build'))</WasmCommonTargetsPath>
diff --git a/eng/native/gen-buildsys.cmd b/eng/native/gen-buildsys.cmd
index f67f17b8d47942..79db6bffae062d 100644
--- a/eng/native/gen-buildsys.cmd
+++ b/eng/native/gen-buildsys.cmd
@@ -62,7 +62,7 @@ if /i "%__Arch%" == "wasm" (
     if /i "%__Os%" == "wasi" (
         if "%WASI_SDK_PATH%" == "" (
             if not exist "%__repoRoot%\src\mono\wasi\wasi-sdk" (
-                echo Error: Should set WASI_SDK_PATH environment variable pointing to emsdk root.
+                echo Error: Should set WASI_SDK_PATH environment variable pointing to WASI SDK root.
                 exit /B 1
             )
 
diff --git a/eng/testing/tests.wasi.targets b/eng/testing/tests.wasi.targets
index 989e934dd8412a..e8f75ee3821bc5 100644
--- a/eng/testing/tests.wasi.targets
+++ b/eng/testing/tests.wasi.targets
@@ -46,7 +46,7 @@
     <_XHarnessArgs Condition="'$(IsFunctionalTest)' == 'true'"     >$(_XHarnessArgs) --expected-exit-code=$(ExpectedExitCode)</_XHarnessArgs>
     <_XHarnessArgs Condition="'$(WasmXHarnessArgs)' != ''"         >$(_XHarnessArgs) $(WasmXHarnessArgs)</_XHarnessArgs>
     <_XHarnessArgs Condition="'$(WasmXHarnessTestsTimeout)' != ''" >$(_XHarnessArgs) &quot;--timeout=$(WasmXHarnessTestsTimeout)&quot;</_XHarnessArgs>
-    <_XHarnessArgs                                                 >$(_XHarnessArgs) --engine-arg=--max-wasm-stack=134217728</_XHarnessArgs>
+    <_XHarnessArgs                                                 >$(_XHarnessArgs) --engine-arg=-W --engine-arg=max-wasm-stack=134217728</_XHarnessArgs>
     <_XHarnessArgs Condition="'$(WasmXHarnessArgsCli)' != ''"      >$(_XHarnessArgs) $(WasmXHarnessArgsCli)</_XHarnessArgs>
 
     <_InvariantGlobalization Condition="'$(InvariantGlobalization)' == 'true'">--env=DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true</_InvariantGlobalization>
diff --git a/src/mono/Directory.Build.props b/src/mono/Directory.Build.props
index 12d6fdb34cfc57..d97bf84a1da660 100644
--- a/src/mono/Directory.Build.props
+++ b/src/mono/Directory.Build.props
@@ -34,10 +34,12 @@
 
   <!-- Directory to provision and use WASI sdk if WASI_SDK_PATH env variable is not set -->
   <PropertyGroup Condition="'$(TargetsWasi)' == 'true'">
-    <_ProvisionWasiSdkDir>$([MSBuild]::NormalizeDirectory($(MSBuildThisFileDirectory), 'wasi', 'wasi-sdk'))</_ProvisionWasiSdkDir>
-    <ShouldProvisionWasiSdk Condition="'$(WASI_SDK_PATH)' == '' and !Exists($(_ProvisionWasiSdkDir))">true</ShouldProvisionWasiSdk>
-    <WASI_SDK_PATH Condition="'$(WASI_SDK_PATH)' == ''">$(_ProvisionWasiSdkDir)</WASI_SDK_PATH>
+    <!-- force download temmporarily https://github.com/dotnet/runtime/issues/101528
+    <WASI_SDK_PATH Condition="'$(WASI_SDK_PATH)' == ''">$([MSBuild]::NormalizeDirectory($(MSBuildThisFileDirectory), 'wasi', 'wasi-sdk'))</WASI_SDK_PATH>
+    -->
+    <WASI_SDK_PATH>$([MSBuild]::NormalizeDirectory($(MSBuildThisFileDirectory), 'wasi', 'wasi-sdk'))</WASI_SDK_PATH>
     <WASI_SDK_PATH>$([MSBuild]::EnsureTrailingSlash('$(WASI_SDK_PATH)').Replace('\', '/'))</WASI_SDK_PATH>
+    <ShouldProvisionWasiSdk Condition="!Exists($(_ProvisionWasiSdkDir))">true</ShouldProvisionWasiSdk>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/mono/mono.proj b/src/mono/mono.proj
index 47eeb0937a88fa..0d855362d99211 100644
--- a/src/mono/mono.proj
+++ b/src/mono/mono.proj
@@ -797,7 +797,7 @@
       <MonoAotCrossOffsetsToolParams Condition="'$(MonoAotOffsetsPrefix)' != ''" Include="--prefix=&quot;$(MonoAotOffsetsPrefix)&quot;" />
       <MonoAotCrossOffsetsToolParams Condition="'$(MonoAotCMakeSysroot)' != ''" Include="--sysroot=&quot;$(MonoAotCMakeSysroot)&quot;" />
       <MonoAotCrossOffsetsToolParams Condition="'$(TargetsBrowser)' == 'true'" Include="--emscripten-sdk=&quot;$([MSBuild]::NormalizePath('$(EMSDK_PATH)', 'upstream', 'emscripten').TrimEnd('\/'))&quot;" />
-      <MonoAotCrossOffsetsToolParams Condition="'$(TargetsWasi)' == 'true'" Include="--wasi-sdk=&quot;$([MSBuild]::NormalizePath('$(WASI_SDK_PATH)').TrimEnd('\/'))&quot;" />
+      <MonoAotCrossOffsetsToolParams Condition="'$(TargetsWasi)' == 'true'" Include="--sysroot=&quot;$([MSBuild]::NormalizePath('$(WASI_SDK_PATH)', 'share/wasi-sysroot'))&quot; --wasi-sdk=&quot;$([MSBuild]::NormalizePath('$(WASI_SDK_PATH)').TrimEnd('\/'))&quot;" />
     </ItemGroup>
 
     <!--
diff --git a/src/mono/mono/tools/offsets-tool/offsets-tool.py b/src/mono/mono/tools/offsets-tool/offsets-tool.py
index 058d27373d28dc..15d7deb4558421 100644
--- a/src/mono/mono/tools/offsets-tool/offsets-tool.py
+++ b/src/mono/mono/tools/offsets-tool/offsets-tool.py
@@ -89,9 +89,11 @@ def require_emscipten_path (args):
 
 		if "wasm" in args.abi:
 			if args.wasi_path != None:
-				self.sys_includes = [args.wasi_path + "/share/wasi-sysroot/include", args.wasi_path + "/lib/clang/17/include", args.mono_path + "/wasi/mono-include"]
+				require_sysroot (args)
+				self.sys_includes = [args.wasi_path + "/share/wasi-sysroot/include", args.wasi_path + "/lib/clang/18/include", args.mono_path + "/wasi/mono-include"]
 				self.target = Target ("TARGET_WASI", None, ["TARGET_WASM"] + WASI_DEFINES)
 				self.target_args += ["-target", args.abi]
+				self.target_args += ["--sysroot", args.sysroot]
 			else:
 				require_emscipten_path (args)
 				clang_path = os.path.dirname(args.libclang)
diff --git a/src/mono/wasi/wasi-sdk-version.txt b/src/mono/wasi/wasi-sdk-version.txt
index aabe6ec3909c9d..2bd5a0a98a36cc 100644
--- a/src/mono/wasi/wasi-sdk-version.txt
+++ b/src/mono/wasi/wasi-sdk-version.txt
@@ -1 +1 @@
-21
+22
diff --git a/src/mono/wasi/wasi.proj b/src/mono/wasi/wasi.proj
index bd03a1a0e79b44..59d2137cf97237 100644
--- a/src/mono/wasi/wasi.proj
+++ b/src/mono/wasi/wasi.proj
@@ -202,10 +202,10 @@
       <CMakeBuildRuntimeConfigureCmd>cmake $(MSBuildThisFileDirectory)runtime</CMakeBuildRuntimeConfigureCmd>
       <CMakeBuildRuntimeConfigureCmd Condition="'$(OS)' == 'Windows_NT'">cmake -G Ninja $(MSBuildThisFileDirectory)runtime</CMakeBuildRuntimeConfigureCmd>
 
+      <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) --no-warn-unused-cli -DCMAKE_TOOLCHAIN_FILE=&quot;$([MSBuild]::NormalizePath('$(WASI_SDK_PATH)', 'share/cmake/wasi-sdk.cmake'))&quot;</CMakeBuildRuntimeConfigureCmd>
       <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DWASI_SDK_PREFIX=$(WASI_SDK_PATH)</CMakeBuildRuntimeConfigureCmd>
       <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DCMAKE_SYSROOT=$(WASI_SDK_PATH)share/wasi-sysroot</CMakeBuildRuntimeConfigureCmd>
       <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DCMAKE_CXX_FLAGS="--sysroot=$(WASI_SDK_PATH)share/wasi-sysroot"</CMakeBuildRuntimeConfigureCmd>
-      <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DCMAKE_TOOLCHAIN_FILE=$(WASI_SDK_PATH)share/cmake/wasi-sdk.cmake</CMakeBuildRuntimeConfigureCmd>
 
       <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DCONFIGURATION_WASICC_FLAGS=&quot;$(CMakeConfigurationWasiFlags)&quot;</CMakeBuildRuntimeConfigureCmd>
       <CMakeBuildRuntimeConfigureCmd>$(CMakeBuildRuntimeConfigureCmd) -DCONFIGURATION_LINK_FLAGS=&quot;$(CMakeConfigurationLinkFlags)&quot;</CMakeBuildRuntimeConfigureCmd>
diff --git a/src/mono/wasi/wasmtime-version.txt b/src/mono/wasi/wasmtime-version.txt
index 0062ac971805f7..e021724948e02e 100644
--- a/src/mono/wasi/wasmtime-version.txt
+++ b/src/mono/wasi/wasmtime-version.txt
@@ -1 +1 @@
-5.0.0
+19.0.2
diff --git a/src/native/libs/Common/pal_error_common.h b/src/native/libs/Common/pal_error_common.h
index e9de2b793e4086..7541132da7b188 100644
--- a/src/native/libs/Common/pal_error_common.h
+++ b/src/native/libs/Common/pal_error_common.h
@@ -336,6 +336,8 @@ inline static int32_t ConvertErrorPlatformToPal(int32_t platformErrno)
         case EWOULDBLOCK:
             return Error_EWOULDBLOCK;
 #endif
+        default:
+            break; // fall through to error
     }
 
     return Error_ENONSTANDARD;
@@ -528,6 +530,8 @@ inline static int32_t ConvertErrorPalToPlatform(int32_t error)
 
         case Error_ENONSTANDARD:
             break; // fall through to assert
+        default:
+            break; // fall through to assert
     }
 
     // We should not use this function to round-trip platform -> pal
diff --git a/src/native/libs/System.Globalization.Native/pal_localeNumberData.c b/src/native/libs/System.Globalization.Native/pal_localeNumberData.c
index 1cc0e55d188b17..837006eee9bf68 100644
--- a/src/native/libs/System.Globalization.Native/pal_localeNumberData.c
+++ b/src/native/libs/System.Globalization.Native/pal_localeNumberData.c
@@ -72,6 +72,8 @@ static char* NormalizeNumericPattern(const UChar* srcPattern, int isNegative)
             case UCHAR_CLOSEPAREN:
                 minusAdded = true;
                 break;
+            default:
+                break;
         }
     }
 
@@ -145,6 +147,9 @@ static char* NormalizeNumericPattern(const UChar* srcPattern, int isNegative)
             case UCHAR_PERCENT:
                 destPattern[index++] = '%';
                 break;
+
+            default:
+                break;
         }
     }
 
diff --git a/src/native/libs/System.Native/pal_io.c b/src/native/libs/System.Native/pal_io.c
index 9c65db55c4ee03..cdd86ed46f0652 100644
--- a/src/native/libs/System.Native/pal_io.c
+++ b/src/native/libs/System.Native/pal_io.c
@@ -49,8 +49,10 @@
 #elif HAVE_SYS_STATVFS_H && !HAVE_NON_LEGACY_STATFS // SunOS
 #include <sys/types.h>
 #include <sys/statvfs.h>
+#if HAVE_STATFS_VFS
 #include <sys/vfs.h>
 #endif
+#endif
 
 #ifdef _AIX
 #include <alloca.h>
@@ -1050,6 +1052,8 @@ int32_t SystemNative_MAdvise(void* address, uint64_t length, int32_t advice)
             errno = ENOTSUP;
             return -1;
 #endif
+        default:
+            break; // fall through to error
     }
 
     assert_msg(false, "Unknown MemoryAdvice", (int)advice);
@@ -1087,6 +1091,8 @@ int64_t SystemNative_SysConf(int32_t name)
             return sysconf(_SC_CLK_TCK);
         case PAL_SC_PAGESIZE:
             return sysconf(_SC_PAGESIZE);
+        default:
+            break; // fall through to error
     }
 
     assert_msg(false, "Unknown SysConf name", (int)name);