diff --git a/Misc/NEWS.d/next/Build/2023-03-20-09-47-46.gh-issue-102838.k3MRiC.rst b/Misc/NEWS.d/next/Build/2023-03-20-09-47-46.gh-issue-102838.k3MRiC.rst
new file mode 100644
index 00000000000000..2a1c3c8617241c
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2023-03-20-09-47-46.gh-issue-102838.k3MRiC.rst
@@ -0,0 +1,2 @@
+Ignore acceptable access of an uninitialized value to fix building
+``--with-memory-sanitizer``. Patch by Illia Volochii.
diff --git a/Misc/README b/Misc/README
index 3dab768ba1a7a4..798ad7f14f65fc 100644
--- a/Misc/README
+++ b/Misc/README
@@ -19,6 +19,7 @@ README                  The file you're reading now
 README.AIX              Information about using Python on AIX
 README.coverity         Information about running Coverity's Prevent on Python
 README.valgrind         Information for Valgrind users, see valgrind-python.supp
+sanitize-ignorelist.txt Entities to be ignored by sanitizers
 SpecialBuilds.txt       Describes extra symbols you can set for debug builds
 svnmap.txt              Map of old SVN revs and branches to hg changeset ids,
                         help history-digging
diff --git a/Misc/sanitize-ignorelist.txt b/Misc/sanitize-ignorelist.txt
new file mode 100644
index 00000000000000..ae39f572cfb216
--- /dev/null
+++ b/Misc/sanitize-ignorelist.txt
@@ -0,0 +1,12 @@
+#
+# This is a file listing entities to be ignored by sanitizers.
+# https://clang.llvm.org/docs/SanitizerSpecialCaseList.html
+#
+
+[memory]
+# medium_value called by maybe_small_long accesses an uninitialized
+# integer in the case of PyLong of size 0, but the integer is then
+# multiplied by zero immediately, so the lack of initialisation has no
+# adverse effect.
+# https://github.com/python/cpython/issues/102509
+fun:maybe_small_long
diff --git a/configure b/configure
index 7aad4fe89e3cbf..8b0bd636fd75bf 100755
--- a/configure
+++ b/configure
@@ -11330,8 +11330,8 @@ fi
 $as_echo "$ax_cv_check_cflags___fsanitize_memory" >&6; }
 if test "x$ax_cv_check_cflags___fsanitize_memory" = xyes; then :
 
-BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer $BASECFLAGS"
-LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 $LDFLAGS"
+BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fsanitize-ignorelist=Misc/sanitize-ignorelist.txt $BASECFLAGS"
+LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fsanitize-ignorelist=Misc/sanitize-ignorelist.txt $LDFLAGS"
 
 else
   as_fn_error $? "The selected compiler doesn't support memory sanitizer" "$LINENO" 5
diff --git a/configure.ac b/configure.ac
index 115998e0753b26..36d63eded91289 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3102,8 +3102,8 @@ AC_ARG_WITH(memory_sanitizer,
 [
 AC_MSG_RESULT($withval)
 AX_CHECK_COMPILE_FLAG([-fsanitize=memory],[
-BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer $BASECFLAGS"
-LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 $LDFLAGS"
+BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fsanitize-ignorelist=Misc/sanitize-ignorelist.txt $BASECFLAGS"
+LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fsanitize-ignorelist=Misc/sanitize-ignorelist.txt $LDFLAGS"
 ],[AC_MSG_ERROR([The selected compiler doesn't support memory sanitizer])])
 # MSan works by controlling memory allocation, our own malloc interferes.
 with_pymalloc="no"