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perl-5.45.1
⭐ Starred 2013 / Release
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

Release Manager's Guide with Checklist for $version ($type)

Checklist

_END_BEGINNING

# Remove beginning # This can also be done with a '=for introduction' in the future $items[0]{'name'} =~ /^NAME/xmsi and shift @items;

$items[0]{'name'} =~ /^MAKING \s+ A \s+ CHECKLIST/xmsi and shift @items;

create_checklist( $type, \@items );

iterate_items( \@items, $type, sub { my $item = shift; print "=head$item->{'head'} $item->{'name'}"; print "$item->{'content'}\n"; } );

if ($html) { my $simple = Pod::Simple::HTML->new; $simple->output_fh(*STDOUT); $simple->parse_string_document($pod_output); }