diff --git a/Kernel/Net/IPv4Socket.cpp b/Kernel/Net/IPv4Socket.cpp
index d51f4d3258..772ac201d4 100644
--- a/Kernel/Net/IPv4Socket.cpp
+++ b/Kernel/Net/IPv4Socket.cpp
@@ -505,6 +505,8 @@ ErrorOr<void> IPv4Socket::setsockopt(int level, int option, Userspace<const void
     if (level != IPPROTO_IP)
         return Socket::setsockopt(level, option, user_value, user_value_size);
 
+    MutexLocker locker(mutex());
+
     switch (option) {
     case IP_TTL: {
         if (user_value_size < sizeof(int))
@@ -569,6 +571,8 @@ ErrorOr<void> IPv4Socket::getsockopt(OpenFileDescription& description, int level
     if (level != IPPROTO_IP)
         return Socket::getsockopt(description, level, option, value, value_size);
 
+    MutexLocker locker(mutex());
+
     socklen_t size;
     TRY(copy_from_user(&size, value_size.unsafe_userspace_ptr()));
 
diff --git a/Kernel/Net/LocalSocket.cpp b/Kernel/Net/LocalSocket.cpp
index ea8adaf303..73205c85c2 100644
--- a/Kernel/Net/LocalSocket.cpp
+++ b/Kernel/Net/LocalSocket.cpp
@@ -386,6 +386,8 @@ ErrorOr<void> LocalSocket::getsockopt(OpenFileDescription& description, int leve
     if (level != SOL_SOCKET)
         return Socket::getsockopt(description, level, option, value, value_size);
 
+    MutexLocker locker(mutex());
+
     socklen_t size;
     TRY(copy_from_user(&size, value_size.unsafe_userspace_ptr()));
 
diff --git a/Kernel/Net/Socket.cpp b/Kernel/Net/Socket.cpp
index 8655b913cb..623495f5c7 100644
--- a/Kernel/Net/Socket.cpp
+++ b/Kernel/Net/Socket.cpp
@@ -78,6 +78,8 @@ ErrorOr<void> Socket::queue_connection_from(NonnullRefPtr<Socket> peer)
 
 ErrorOr<void> Socket::setsockopt(int level, int option, Userspace<const void*> user_value, socklen_t user_value_size)
 {
+    MutexLocker locker(mutex());
+
     if (level != SOL_SOCKET)
         return ENOPROTOOPT;
     VERIFY(level == SOL_SOCKET);
@@ -133,6 +135,8 @@ ErrorOr<void> Socket::setsockopt(int level, int option, Userspace<const void*> u
 
 ErrorOr<void> Socket::getsockopt(OpenFileDescription&, int level, int option, Userspace<void*> value, Userspace<socklen_t*> value_size)
 {
+    MutexLocker locker(mutex());
+
     socklen_t size;
     TRY(copy_from_user(&size, value_size.unsafe_userspace_ptr()));
 
diff --git a/Kernel/Net/Socket.h b/Kernel/Net/Socket.h
index 72a159c843..013172c11c 100644
--- a/Kernel/Net/Socket.h
+++ b/Kernel/Net/Socket.h
@@ -130,16 +130,22 @@ protected:
 
     Role m_role { Role::None };
 
-    ErrorOr<void> so_error() const { return m_so_error; }
+    ErrorOr<void> so_error() const
+    {
+        VERIFY(m_mutex.is_locked_by_current_thread());
+        return m_so_error;
+    }
 
     Error set_so_error(ErrnoCode error_code)
     {
+        MutexLocker locker(mutex());
         auto error = Error::from_errno(error_code);
         m_so_error = error;
         return error;
     }
     Error set_so_error(Error error)
     {
+        MutexLocker locker(mutex());
         m_so_error = error;
         return error;
     }