--- contrib/libs/clang18-rt/lib/ubsan/ubsan_diag.cpp
+++ contrib/libs/clang18-rt/lib/ubsan/ubsan_diag.cpp
@@ -412,11 +412,17 @@ static const char *kSuppressionTypes[] = {
     kVptrCheck,
 };

+SANITIZER_INTERFACE_WEAK_DEF(const char *, __ubsan_default_suppressions, void) {
+  return "";
+}
+
 void __ubsan::InitializeSuppressions() {
   CHECK_EQ(nullptr, suppression_ctx);
   suppression_ctx = new (suppression_placeholder)
       SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes));
   suppression_ctx->ParseFromFile(flags()->suppressions);
+  if (&__ubsan_default_suppressions)
+    suppression_ctx->Parse(__ubsan_default_suppressions());
 }

 bool __ubsan::IsVptrCheckSuppressed(const char *TypeName) {