diff --git a/Misc/NEWS.d/next/Library/2024-03-01-14-22-08.gh-issue-115978.r2ePTo.rst b/Misc/NEWS.d/next/Library/2024-03-01-14-22-08.gh-issue-115978.r2ePTo.rst
new file mode 100644
index 00000000000000..2adac31ac6c21d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-03-01-14-22-08.gh-issue-115978.r2ePTo.rst
@@ -0,0 +1,4 @@
+Disable preadv(), readv(), pwritev(), and writev() on WASI.
+
+Under wasmtime for WASI 0.2, these functions don't pass test_posix
+(https://github.com/bytecodealliance/wasmtime/issues/7830).
diff --git a/Tools/wasm/config.site-wasm32-wasi b/Tools/wasm/config.site-wasm32-wasi
index fe6c90e59d67a2..60f5b016a216d7 100644
--- a/Tools/wasm/config.site-wasm32-wasi
+++ b/Tools/wasm/config.site-wasm32-wasi
@@ -43,3 +43,12 @@ ac_cv_header_netpacket_packet_h=no
 
 # Disable int-conversion for wask-sdk as it triggers an error from version 17.
 ac_cv_disable_int_conversion=yes
+
+# preadv(), readv(), pwritev(), and writev() under wasmtime's WASI 0.2 support
+# do not use more than the first buffer provided, failing under test_posix.
+# Since wasmtime will not be changing this behaviour, disable the functions.
+# https://github.com/bytecodealliance/wasmtime/issues/7830
+ac_cv_func_preadv=no
+ac_cv_func_readv=no
+ac_cv_func_pwritev=no
+ac_cv_func_writev=no