/ 
perl-5.44.0
⭐ Starred 2013 / TAP::Parser::YAMLish::Writer
Security Advisories (1)
CVE-2026-15534 (2026-08-09)

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject length plus one times the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14, leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads go past the end of the allocation, and on failure CACHEsayNO sets a bit past it. A caller that matches an attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt heap memory.

NAME

TAP::Parser::YAMLish::Writer - Write YAMLish data

VERSION

Version 3.52

SYNOPSIS

use TAP::Parser::YAMLish::Writer;

my $data = {
    one => 1,
    two => 2,
    three => [ 1, 2, 3 ],
};

my $yw = TAP::Parser::YAMLish::Writer->new;

# Write to an array...
$yw->write( $data, \@some_array );

# ...an open file handle...
$yw->write( $data, $some_file_handle );

# ...a string ...
$yw->write( $data, \$some_string );

# ...or a closure
$yw->write( $data, sub {
    my $line = shift;
    print "$line\n";
} );

DESCRIPTION

Encodes a scalar, hash reference or array reference as YAMLish.

METHODS

Class Methods

new

my $writer = TAP::Parser::YAMLish::Writer->new;

The constructor new creates and returns an empty TAP::Parser::YAMLish::Writer object.

Instance Methods

write

$writer->write($obj, $output );

Encode a scalar, hash reference or array reference as YAML.

my $writer = sub {
    my $line = shift;
    print SOMEFILE "$line\n";
};

my $data = {
    one => 1,
    two => 2,
    three => [ 1, 2, 3 ],
};

my $yw = TAP::Parser::YAMLish::Writer->new;
$yw->write( $data, $writer );

The $output argument may be:

  • a reference to a scalar to append YAML to

  • the handle of an open file

  • a reference to an array into which YAML will be pushed

  • a code reference

If you supply a code reference the subroutine will be called once for each line of output with the line as its only argument. Passed lines will have no trailing newline.

AUTHOR

Andy Armstrong, <andy@hexten.net>

SEE ALSO

YAML::Tiny, YAML, YAML::Syck, Config::Tiny, CSS::Tiny, http://use.perl.org/~Alias/journal/29427

COPYRIGHT

Copyright 2007-2011 Andy Armstrong.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.