/ 
perl-5.44.0
⭐ Starred 2013 / TAP::Parser::YAMLish::Reader
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::Reader - Read YAMLish data from iterator

VERSION

Version 3.52

SYNOPSIS

DESCRIPTION

Note that parts of this code were derived from YAML::Tiny with the permission of Adam Kennedy.

METHODS

Class Methods

new

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

my $reader = TAP::Parser::YAMLish::Reader->new;

Instance Methods

read

my $got = $reader->read($iterator);

Read YAMLish from a TAP::Parser::Iterator and return the data structure it represents.

get_raw

my $source = $reader->get_source;

Return the raw YAMLish source from the most recent read.

AUTHOR

Andy Armstrong, <andy@hexten.net>

Adam Kennedy wrote YAML::Tiny which provided the template and many of the YAML matching regular expressions for this module.

SEE ALSO

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

COPYRIGHT

Copyright 2007-2011 Andy Armstrong.

Portions copyright 2006-2008 Adam Kennedy.

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.