diff --git a/sc/qa/unit/ucalc_formula2.cxx b/sc/qa/unit/ucalc_formula2.cxx
index cf95687ede53..76950c2a399e 100644
--- a/sc/qa/unit/ucalc_formula2.cxx
+++ b/sc/qa/unit/ucalc_formula2.cxx
@@ -2273,6 +2273,44 @@ CPPUNIT_TEST_FIXTURE(TestFormula2, testMatrixArithmeticMismatchedExtent)
     m_pDoc->DeleteTab(0);
 }
 
+CPPUNIT_TEST_FIXTURE(TestFormula2, testMatrixConcatMismatchedExtent)
+{
+    // String concatenation of two two-dimensional ranges of unequal
+    // length extends the result to the longer range. Where the two
+    // ranges overlap the cells join together. The rows past the shorter
+    // operand have no partner to join and stay empty.
+    sc::AutoCalcSwitch aACSwitch(*m_pDoc, true);
+    m_pDoc->InsertTab(0, u"Test"_ustr);
+
+    // First operand A1:B3, three rows by two columns.
+    m_pDoc->SetString(ScAddress(0, 0, 0), u"a"_ustr);
+    m_pDoc->SetString(ScAddress(1, 0, 0), u"b"_ustr);
+    m_pDoc->SetString(ScAddress(0, 1, 0), u"c"_ustr);
+    m_pDoc->SetString(ScAddress(1, 1, 0), u"d"_ustr);
+    m_pDoc->SetString(ScAddress(0, 2, 0), u"e"_ustr);
+    m_pDoc->SetString(ScAddress(1, 2, 0), u"f"_ustr);
+
+    // Second operand D1:E2, two rows by two columns, one row shorter.
+    m_pDoc->SetString(ScAddress(3, 0, 0), u"1"_ustr);
+    m_pDoc->SetString(ScAddress(4, 0, 0), u"2"_ustr);
+    m_pDoc->SetString(ScAddress(3, 1, 0), u"3"_ustr);
+    m_pDoc->SetString(ScAddress(4, 1, 0), u"4"_ustr);
+
+    ScMarkData aMark(m_pDoc->GetSheetLimits());
+    aMark.SelectOneTable(0);
+    m_pDoc->InsertMatrixFormula(6, 0, 7, 2, aMark, u"=A1:B3&D1:E2"_ustr);
+
+    CPPUNIT_ASSERT_EQUAL(u"a1"_ustr, m_pDoc->GetString(ScAddress(6, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"b2"_ustr, m_pDoc->GetString(ScAddress(7, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"c3"_ustr, m_pDoc->GetString(ScAddress(6, 1, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"d4"_ustr, m_pDoc->GetString(ScAddress(7, 1, 0)));
+    // The third row is past the second operand, so those cells stay empty.
+    CPPUNIT_ASSERT_EQUAL(OUString(), m_pDoc->GetString(ScAddress(6, 2, 0)));
+    CPPUNIT_ASSERT_EQUAL(OUString(), m_pDoc->GetString(ScAddress(7, 2, 0)));
+
+    m_pDoc->DeleteTab(0);
+}
+
 CPPUNIT_TEST_FIXTURE(TestFormula2, testMatrixOp)
 {
     m_pDoc->InsertTab(0, u"Test"_ustr);
diff --git a/sc/source/core/tool/scmatrix.cxx b/sc/source/core/tool/scmatrix.cxx
index 71f5e0fb9b4b..339e0a7f21fe 100644
--- a/sc/source/core/tool/scmatrix.cxx
+++ b/sc/source/core/tool/scmatrix.cxx
@@ -2888,7 +2888,7 @@ void ScMatrixImpl::MatConcat(SCSIZE nMaxCol, SCSIZE nMaxRow, const ScMatrixRef&
     else
         xMat1->ExecuteOperation(
                 std::pair<size_t, size_t>(0, 0),
-                std::pair<size_t, size_t>(nMaxRow - 1, nMaxCol - 1),
+                std::pair<size_t, size_t>(std::min(nR1, nMaxRow) - 1, std::min(nC1, nMaxCol) - 1),
                 std::move(aDoubleFunc), std::move(aBoolFunc), std::move(aStringFunc), std::move(aEmptyFunc));
 
     std::vector<svl::SharedString> aSharedString(nMaxCol*nMaxRow);
@@ -2952,7 +2952,7 @@ void ScMatrixImpl::MatConcat(SCSIZE nMaxCol, SCSIZE nMaxRow, const ScMatrixRef&
     else
         xMat2->ExecuteOperation(
                 std::pair<size_t, size_t>(0, 0),
-                std::pair<size_t, size_t>(nMaxRow - 1, nMaxCol - 1),
+                std::pair<size_t, size_t>(std::min(nR2, nMaxRow) - 1, std::min(nC2, nMaxCol) - 1),
                 std::move(aDoubleFunc2), std::move(aBoolFunc2), std::move(aStringFunc2), std::move(aEmptyFunc2));
 
     aString.clear();