diff --git a/3rdparty/README.md b/3rdparty/README.md
index ed5de2b3c572..f39c70157b62 100644
--- a/3rdparty/README.md
+++ b/3rdparty/README.md
@@ -248,7 +248,7 @@
 
 ## yasio
 - [![Upstream](https://img.shields.io/github/v/release/yasio/yasio?label=Upstream)](https://github.com/yasio/yasio)
-- Version: 4.2.2
+- Version: 4.2.3
 - License: MIT WITH Anti-996
 
 ## zlib
diff --git a/3rdparty/yasio/yasio/config.hpp b/3rdparty/yasio/yasio/config.hpp
index 9f65a1bcc7ef..77c35c1301bf 100644
--- a/3rdparty/yasio/yasio/config.hpp
+++ b/3rdparty/yasio/yasio/config.hpp
@@ -205,7 +205,7 @@ SOFTWARE.
 /*
 **  The yasio version macros
 */
-#define YASIO_VERSION_NUM 0x040202
+#define YASIO_VERSION_NUM 0x040203
 
 /*
 ** The macros used by io_service.
diff --git a/3rdparty/yasio/yasio/io_service.cpp b/3rdparty/yasio/yasio/io_service.cpp
index 96a607ec556f..fa39f076c6b4 100644
--- a/3rdparty/yasio/yasio/io_service.cpp
+++ b/3rdparty/yasio/yasio/io_service.cpp
@@ -76,8 +76,10 @@ struct yasio_kcp_options {
     auto __msg           = ::yasio::strfmt(127, "[yasio][%lld]" format "\n", ::yasio::clock<system_clock_t>(), ##__VA_ARGS__); \
     if (__cprint)                                                                                                              \
       __cprint(level, __msg.c_str());                                                                                          \
-    else                                                                                                                       \
+    else {                                                                                                                     \
+      __msg.back() = '\0';                                                                                                    \
       YASIO_LOG_TAG("", "%s", __msg.c_str());                                                                                  \
+    }                                                                                                                          \
   } while (false)
 // clang-format on