diff --git a/dev/deps/spark-deps-hadoop-2.7-hive-1.2 b/dev/deps/spark-deps-hadoop-2.7-hive-1.2
index 344806e447689..7a67d476ea25b 100644
--- a/dev/deps/spark-deps-hadoop-2.7-hive-1.2
+++ b/dev/deps/spark-deps-hadoop-2.7-hive-1.2
@@ -178,10 +178,10 @@ protobuf-java/2.5.0//protobuf-java-2.5.0.jar
 py4j/0.10.9//py4j-0.10.9.jar
 pyrolite/4.30//pyrolite-4.30.jar
 scala-collection-compat_2.12/2.1.1//scala-collection-compat_2.12-2.1.1.jar
-scala-compiler/2.12.10//scala-compiler-2.12.10.jar
-scala-library/2.12.10//scala-library-2.12.10.jar
+scala-compiler/2.12.12//scala-compiler-2.12.12.jar
+scala-library/2.12.12//scala-library-2.12.12.jar
 scala-parser-combinators_2.12/1.1.2//scala-parser-combinators_2.12-1.1.2.jar
-scala-reflect/2.12.10//scala-reflect-2.12.10.jar
+scala-reflect/2.12.12//scala-reflect-2.12.12.jar
 scala-xml_2.12/1.2.0//scala-xml_2.12-1.2.0.jar
 shapeless_2.12/2.3.3//shapeless_2.12-2.3.3.jar
 shims/0.7.45//shims-0.7.45.jar
diff --git a/dev/deps/spark-deps-hadoop-2.7-hive-2.3 b/dev/deps/spark-deps-hadoop-2.7-hive-2.3
index 969249b963e7b..1c6aecdb8f9dd 100644
--- a/dev/deps/spark-deps-hadoop-2.7-hive-2.3
+++ b/dev/deps/spark-deps-hadoop-2.7-hive-2.3
@@ -192,10 +192,10 @@ protobuf-java/2.5.0//protobuf-java-2.5.0.jar
 py4j/0.10.9//py4j-0.10.9.jar
 pyrolite/4.30//pyrolite-4.30.jar
 scala-collection-compat_2.12/2.1.1//scala-collection-compat_2.12-2.1.1.jar
-scala-compiler/2.12.10//scala-compiler-2.12.10.jar
-scala-library/2.12.10//scala-library-2.12.10.jar
+scala-compiler/2.12.12//scala-compiler-2.12.12.jar
+scala-library/2.12.12//scala-library-2.12.12.jar
 scala-parser-combinators_2.12/1.1.2//scala-parser-combinators_2.12-1.1.2.jar
-scala-reflect/2.12.10//scala-reflect-2.12.10.jar
+scala-reflect/2.12.12//scala-reflect-2.12.12.jar
 scala-xml_2.12/1.2.0//scala-xml_2.12-1.2.0.jar
 shapeless_2.12/2.3.3//shapeless_2.12-2.3.3.jar
 shims/0.7.45//shims-0.7.45.jar
diff --git a/dev/deps/spark-deps-hadoop-3.2-hive-2.3 b/dev/deps/spark-deps-hadoop-3.2-hive-2.3
index e98e4676107ed..598bf8410cc22 100644
--- a/dev/deps/spark-deps-hadoop-3.2-hive-2.3
+++ b/dev/deps/spark-deps-hadoop-3.2-hive-2.3
@@ -207,10 +207,10 @@ py4j/0.10.9//py4j-0.10.9.jar
 pyrolite/4.30//pyrolite-4.30.jar
 re2j/1.1//re2j-1.1.jar
 scala-collection-compat_2.12/2.1.1//scala-collection-compat_2.12-2.1.1.jar
-scala-compiler/2.12.10//scala-compiler-2.12.10.jar
-scala-library/2.12.10//scala-library-2.12.10.jar
+scala-compiler/2.12.12//scala-compiler-2.12.12.jar
+scala-library/2.12.12//scala-library-2.12.12.jar
 scala-parser-combinators_2.12/1.1.2//scala-parser-combinators_2.12-1.1.2.jar
-scala-reflect/2.12.10//scala-reflect-2.12.10.jar
+scala-reflect/2.12.12//scala-reflect-2.12.12.jar
 scala-xml_2.12/1.2.0//scala-xml_2.12-1.2.0.jar
 shapeless_2.12/2.3.3//shapeless_2.12-2.3.3.jar
 shims/0.7.45//shims-0.7.45.jar
diff --git a/docs/_config.yml b/docs/_config.yml
index 93e1566a8e638..ec1c05fb188ff 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -20,7 +20,7 @@ include:
 SPARK_VERSION: 3.1.0-SNAPSHOT
 SPARK_VERSION_SHORT: 3.1.0
 SCALA_BINARY_VERSION: "2.12"
-SCALA_VERSION: "2.12.10"
+SCALA_VERSION: "2.12.12"
 MESOS_VERSION: 1.0.0
 SPARK_ISSUE_TRACKER_URL: https://issues.apache.org/jira/browse/SPARK
 SPARK_GITHUB_URL: https://github.com/apache/spark
diff --git a/external/docker/spark-test/base/Dockerfile b/external/docker/spark-test/base/Dockerfile
index 5bec5d3f16548..5035d99a5e2e6 100644
--- a/external/docker/spark-test/base/Dockerfile
+++ b/external/docker/spark-test/base/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get update && \
     apt-get install -y less openjdk-8-jre-headless iproute2 vim-tiny sudo openssh-server && \
     rm -rf /var/lib/apt/lists/*
 
-ENV SCALA_VERSION 2.12.10
+ENV SCALA_VERSION 2.12.12
 ENV CDH_VERSION cdh4
 ENV SCALA_HOME /opt/scala-$SCALA_VERSION
 ENV SPARK_HOME /opt/spark
diff --git a/pom.xml b/pom.xml
index 279d76d42ce12..81a9b136efed9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -160,7 +160,7 @@
     <commons.math3.version>3.4.1</commons.math3.version>
     <!-- managed up from 3.2.1 for SPARK-11652 -->
     <commons.collections.version>3.2.2</commons.collections.version>
-    <scala.version>2.12.10</scala.version>
+    <scala.version>2.12.12</scala.version>
     <scala.binary.version>2.12</scala.binary.version>
     <scalafmt.parameters>--test</scalafmt.parameters>
     <!-- for now, not running scalafmt as part of default verify pipeline -->
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 05de21b9eafec..dcb549f803215 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -74,7 +74,7 @@ object ScalaReflection extends ScalaReflection {
   /**
    * Synchronize to prevent concurrent usage of `<:<` operator.
    * This operator is not thread safe in any current version of scala; i.e.
-   * (2.11.12, 2.12.10, 2.13.0-M5).
+   * (2.11.12, 2.12.12, 2.13.0-M5).
    *
    * See https://github.com/scala/bug/issues/10766
    */