if (my $list = $line =~ /\(\d+(,\d+)*\)/) { ... }

The problem with this is it only captures the match success status in the  $list scalar:

c:\@Work\Perl>perl -wMstrict -le
"my $line =
   '[AHB_REPORTER][INFO]: action(62,1,0,0,0,0,5,53,9,0,190)D:/XYZ/reg/
+Tests/Mcu/A_test.cCALL: (null)';
 if (my $list = $line =~ /\(\d+(,\d+)*\)/) {
   print qq{'$list'};
   }
"
'1'
[download]

Because of the way something like  (,\d+)* works, changing  $list to an array  @list isn't much better:

c:\@Work\Perl>perl -wMstrict -le
"my $line =
   '[AHB_REPORTER][INFO]: action(62,1,0,0,0,0,5,53,9,0,190)D:/XYZ/reg/
+Tests/Mcu/A_test.cCALL: (null)';
 if (my @list = $line =~ /\(\d+(,\d+)*\)/) {
   print qq{(@list)};
   }
"
(,190)
[download]

(This works the same with or without a  /g modifier on the  m// match.)

To extract all digit groups, you could do something like:

c:\@Work\Perl>perl -wMstrict -MData::Dump; -le
"my $line =
   '[AHB_REPORTER][INFO]: action(62,1,0,0,0,0,5,53,9,0,190)D:/XYZ/reg/
+Tests/Mcu/A_test.cCALL: (null)';
 if (my @list = $line =~ m{ (?: \G , | action\( ) (\d+) }xmsg) {
   printf qq{'$_' } for @list;
   print '';
   my %hash = do { my $k = 'a';  map { $_ ? ($k++ => $_) : () } @list 
+};
   dd \%hash;
   }
"
'62' '1' '0' '0' '0' '0' '5' '53' '9' '0' '190'
{ a => 62, b => 1, c => 5, d => 53, e => 9, f => 190 }
[download]

(Add  \s* whitespace flavoring to taste.) (Update: The  \G , pattern assumes that a  , (comma) never occurs at the beginning of  $line.)

Update: If you want to get a bit fancy, do it all in one swell foop and then just test if the hash has anything in it:

c:\@Work\Perl>perl -wMstrict -MData::Dump -le
"my $line =
   '[AHB_REPORTER][INFO]: action(62,1,0,0,0,0,5,53,9,0,190)D:/XYZ/reg/
+Tests/Mcu/A_test.cCALL: (null)';
 ;;
 my %hash = do {
   my $k = 'a';
   map { $_ ? ($k++ => $_) : () }
   $line =~ m{ (?: \G , | action [(] ) \K \d+ }xmsg;
   };
 ;;
 if (%hash) {
   dd \%hash;
   }
 else {
   print 'no got';
   }
"
{ a => 62, b => 1, c => 5, d => 53, e => 9, f => 190 }
[download]

(The  \K regex operator comes with Perl versions 5.10+. If your version pre-dates 5.10, let me know and I'll supply a simple fix.)