diff --git a/src/coreclr/pal/src/arch/arm64/context2.S b/src/coreclr/pal/src/arch/arm64/context2.S
index 5cc537ab84bca9..40f46957025dc6 100644
--- a/src/coreclr/pal/src/arch/arm64/context2.S
+++ b/src/coreclr/pal/src/arch/arm64/context2.S
@@ -296,11 +296,3 @@ LEAF_END RestoreCompleteContext, _TEXT
 
 #endif // __APPLE__
 
-// Incoming:
-//  None
-//
-.arch_extension sve
-    LEAF_ENTRY CONTEXT_GetSveLengthFromOS, _TEXT
-        rdvl    x0, 1
-        ret     lr
-    LEAF_END CONTEXT_GetSveLengthFromOS, _TEXT
diff --git a/src/coreclr/pal/src/include/pal/context.h b/src/coreclr/pal/src/include/pal/context.h
index 8658cdebb25cbc..9d5e3f01e5f59c 100644
--- a/src/coreclr/pal/src/include/pal/context.h
+++ b/src/coreclr/pal/src/include/pal/context.h
@@ -1622,21 +1622,6 @@ DWORD CONTEXTGetExceptionCodeForSignal(const siginfo_t *siginfo,
 
 #endif  // HAVE_MACH_EXCEPTIONS else
 
-#if defined(HOST_ARM64)
-/*++
-Function :
-    CONTEXT_GetSveLengthFromOS
-
-    Gets the SVE vector length
-Parameters :
-    None
-Return value :
-    The SVE vector length in bytes
---*/
-DWORD64
-CONTEXT_GetSveLengthFromOS(
-    );
-#endif // HOST_ARM64
 
 #ifdef __cplusplus
 }
diff --git a/src/coreclr/pal/src/thread/context.cpp b/src/coreclr/pal/src/thread/context.cpp
index 522fe66aad1282..16964ce4e885ed 100644
--- a/src/coreclr/pal/src/thread/context.cpp
+++ b/src/coreclr/pal/src/thread/context.cpp
@@ -896,11 +896,17 @@ void CONTEXTToNativeContext(CONST CONTEXT *lpContext, native_context_t *native)
         if (sve && sve->head.size >= SVE_SIG_CONTEXT_SIZE(sve_vq_from_vl(sve->vl)))
         {
             //TODO-SVE: This only handles vector lengths of 128bits.
-            if (CONTEXT_GetSveLengthFromOS() == 16)
+            // Use sve->vl from the signal frame to avoid SIGILL on platforms that
+            // provide an SVE context record without supporting SVE instructions
+            // (e.g. Apple M4 with SME streaming SVE under Virtualization.Framework).
+            if (sve->vl == 16)
             {
                 _ASSERT((lpContext->XStateFeaturesMask & XSTATE_MASK_ARM64_SVE) == XSTATE_MASK_ARM64_SVE);
 
-                uint16_t vq = sve_vq_from_vl(lpContext->Vl);
+                // Derive vq from the signal frame's vl (the authoritative layout)
+                // rather than lpContext->Vl, to ensure offset calculations always
+                // match the actual frame even in non-debug builds.
+                uint16_t vq = sve_vq_from_vl(sve->vl);
 
                 // Vector length should not have changed.
                 _ASSERTE(lpContext->Vl == sve->vl);
@@ -1255,9 +1261,12 @@ void CONTEXTFromNativeContext(const native_context_t *native, LPCONTEXT lpContex
         if (sve && sve->head.size >= SVE_SIG_CONTEXT_SIZE(sve_vq_from_vl(sve->vl)))
         {
             //TODO-SVE: This only handles vector lengths of 128bits.
-            if (CONTEXT_GetSveLengthFromOS() == 16)
+            // Use sve->vl from the signal frame to avoid SIGILL on platforms that
+            // provide an SVE context record without supporting SVE instructions
+            // (e.g. Apple M4 with SME streaming SVE under Virtualization.Framework).
+            if (sve->vl == 16)
             {
-                _ASSERTE((sve->vl > 0) && (sve->vl % 16 == 0));
+                _ASSERTE(sve->head.size >= SVE_SIG_CONTEXT_SIZE(sve_vq_from_vl(16)));
                 lpContext->Vl  = sve->vl;
 
                 uint16_t vq = sve_vq_from_vl(sve->vl);