diff --git a/third_party/libtiff/METADATA b/third_party/libtiff/METADATA
index 7d36a06..7956a6f 100644
--- a/third_party/libtiff/METADATA
+++ b/third_party/libtiff/METADATA
@@ -15,5 +15,8 @@
     mitigated_security_patch: "CVE-2023-26965"
     mitigated_security_patch: "CVE-2023-40745"
     mitigated_security_patch: "CVE-2023-41175"
+
+    # There are no callers to TIFFRasterScanlineSize() in PDFium's code base.
+    mitigated_security_patch: "CVE-2023-52355"
   }
 }