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perl-5.42.0
⭐ Starred 2013 / ExtUtils::MM_Cygwin
Security Advisories (2)
CVE-2026-4176 (2026-03-29)

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

CVE-2026-8376 (2026-05-25)

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

NAME

ExtUtils::MM_Cygwin - methods to override UN*X behaviour in ExtUtils::MakeMaker

SYNOPSIS

use ExtUtils::MM_Cygwin; # Done internally by ExtUtils::MakeMaker if needed

DESCRIPTION

See ExtUtils::MM_Unix for a documentation of the methods provided there.

os_flavor

We're Unix and Cygwin.

cflags

if configured for dynamic loading, triggers #define EXT in EXTERN.h

replace_manpage_separator

replaces strings '::' with '.' in MAN*POD man page names

init_linker

points to libperl.a

maybe_command

Determine whether a file is native to Cygwin by checking whether it resides inside the Cygwin installation (using Windows paths). If so, use ExtUtils::MM_Unix to determine if it may be a command. Otherwise use the tests from ExtUtils::MM_Win32.

dynamic_lib

Use the default to produce the *.dll's. But for new archdir dll's use the same rebase address if the old exists.

install

Rebase dll's with the global rebase database after installation.