diff --git a/swift/extractor/infra/SwiftTagTraits.h b/swift/extractor/infra/SwiftTagTraits.h
index 806ad0a5ffd1..f7825043edda 100644
--- a/swift/extractor/infra/SwiftTagTraits.h
+++ b/swift/extractor/infra/SwiftTagTraits.h
@@ -287,6 +287,7 @@ MAP(swift::TypeBase, TypeTag)
     MAP(swift::BuiltinNonDefaultDistributedActorStorageType, void)  // Does not appear in AST/SIL, only used during IRGen
     MAP(swift::BuiltinFixedArrayType, BuiltinFixedArrayTypeTag)
     MAP(swift::BuiltinUnboundGenericType, void)  // Only used during type resolution
+    MAP(swift::BuiltinImplicitActorType, void)  // SIL type
   MAP(swift::TupleType, TupleTypeTag)
   MAP(swift::ReferenceStorageType, ReferenceStorageTypeTag)
   MAP(swift::WeakStorageType, WeakStorageTypeTag)
diff --git a/swift/extractor/translators/ExprTranslator.cpp b/swift/extractor/translators/ExprTranslator.cpp
index 936bf64940f4..a5ae49230b83 100644
--- a/swift/extractor/translators/ExprTranslator.cpp
+++ b/swift/extractor/translators/ExprTranslator.cpp
@@ -538,7 +538,7 @@ void ExprTranslator::fillSelfApplyExpr(const swift::SelfApplyExpr& expr,
 
 void ExprTranslator::fillLookupExpr(const swift::LookupExpr& expr, codeql::LookupExpr& entry) {
   entry.base = dispatcher.fetchLabel(expr.getBase());
-  if (expr.hasDecl()) {
+  if (expr.hasDecl() && !expr.getDecl().getDecl()->isUnavailable()) {
     entry.member = dispatcher.fetchLabel(expr.getDecl().getDecl());
   }
 }
diff --git a/swift/ql/lib/change-notes/2025-12-18-swift-6.2.3.md b/swift/ql/lib/change-notes/2025-12-18-swift-6.2.3.md
new file mode 100644
index 000000000000..b81064600493
--- /dev/null
+++ b/swift/ql/lib/change-notes/2025-12-18-swift-6.2.3.md
@@ -0,0 +1,4 @@
+---
+category: majorAnalysis
+---
+* Upgraded to allow analysis of Swift 6.2.3.
\ No newline at end of file
diff --git a/swift/third_party/resources/resource-dir-linux.zip b/swift/third_party/resources/resource-dir-linux.zip
index 21f02672b1b0..2daa0182274f 100644
--- a/swift/third_party/resources/resource-dir-linux.zip
+++ b/swift/third_party/resources/resource-dir-linux.zip
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:9d2aa88f3f9e2ff181a9c9607f95804b959fb334947cf72c566666b3be98ff2e
-size 385200751
+oid sha256:ab0279edb35706dbd5c238f6ea29b2a275bb837e1d6485e150801551c7f0740e
+size 385211225
diff --git a/swift/third_party/resources/resource-dir-macos.zip b/swift/third_party/resources/resource-dir-macos.zip
index 1a059eda5ef8..3bcca5372bac 100644
--- a/swift/third_party/resources/resource-dir-macos.zip
+++ b/swift/third_party/resources/resource-dir-macos.zip
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b5e4bfbfaf1c9bae0bff0580797803a05328c08fffee47de406a5fa6cd7e19c7
-size 613729529
+oid sha256:e358d99dab2bf07d70a06d8d4119c05ee40e33cdc659ad787595dc56cb405755
+size 613934298
diff --git a/swift/third_party/resources/swift-prebuilt-linux.tar.zst b/swift/third_party/resources/swift-prebuilt-linux.tar.zst
index 2770d5be19f7..5caeaeb8b5ff 100644
--- a/swift/third_party/resources/swift-prebuilt-linux.tar.zst
+++ b/swift/third_party/resources/swift-prebuilt-linux.tar.zst
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b5efba3953668d02a15b74bcf637831be99824702cfd74ac8cf53b31d89a4f2a
-size 132824388
+oid sha256:ad8d6611bfd3c749435e44fa25a300082efb308c21c5da1305c65bd2c5d8fec4
+size 132921192
diff --git a/swift/third_party/resources/swift-prebuilt-macos.tar.zst b/swift/third_party/resources/swift-prebuilt-macos.tar.zst
index 7121b9743a56..b57ed126f8fa 100644
--- a/swift/third_party/resources/swift-prebuilt-macos.tar.zst
+++ b/swift/third_party/resources/swift-prebuilt-macos.tar.zst
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:4b5e8997a99155330871e146288a8947fa224ba05e54539c795f21c082c7a940
-size 115298351
+oid sha256:a96536acde3a054a2528feedbb6ffa71fb7ffa6b68f0838f2f007e7474fc0b84
+size 115338478