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perl-5.44.0
⭐ Starred 2013 / TAP::Base
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::Base - Base class that provides common functionality to TAP::Parser and TAP::Harness

VERSION

Version 3.52

SYNOPSIS

package TAP::Whatever;

use base 'TAP::Base';

# ... later ...

my $thing = TAP::Whatever->new();

$thing->callback( event => sub {
    # do something interesting
} );

DESCRIPTION

TAP::Base provides callback management.

METHODS

Class Methods

callback

Install a callback for a named event.

get_time

Return the current time using Time::HiRes if available.

time_is_hires

Return true if the time returned by get_time is high resolution (i.e. if Time::HiRes is available).

get_times

Return array reference of the four-element list of CPU seconds, as with "times" in perlfunc.