/ 
perl-5.40.2
⭐ Starred 2013 / buildperl.pl
Security Advisories (2)
CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

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.

NAME

buildperl.pl - build/install perl distributions

SYNOPSIS

perl buildperl.pl [options]

--help                      show this help

--source=directory          directory containing source tarballs
                            [default: /tmp/perl/source]

--build=directory           directory used for building perls [EXPAND]
                            [default: /tmp/perl/build/<config>]

--prefix=directory          use this installation prefix [EXPAND]
                            [default:
                            /tmp/perl/install/<config>/<perl>]

--config=configuration      build this configuration [MULTI]
                            The possibilities for this parameter are:
                              'thread', 'thread5005', 'debug';
                               and 'default',
                               which means none of the others.
                            [default: all possible configurations]

--perl=version              build this version of perl [MULTI]
                            [default: all possible versions]

--force                     rebuild and install already installed
                            versions

--test                      run test suite after building

--noinstall                 don't install after building

--patch                     only patch the perl source in the current
                            directory

--oneshot                   build from the perl source in the current
                            directory (extra arguments are passed to
                            Configure)

-j N                        Build and test with N parallel jobs
                            [default: 1]

options tagged with [MULTI] can be given multiple times

options tagged with [EXPAND] expand the following items

  <perl>      versioned perl directory  (e.g. 'perl-5.6.1')
  <version>   perl version              (e.g. '5.6.1')
  <config>    name of the configuration (e.g. 'default')

EXAMPLES

The following examples assume that your Perl source tarballs are in /tmp/perl/source. If they are somewhere else, use the --source option to specify a different source directory.

To build a default configuration of perl5.004_05 and install it to /opt/perl5.004_05, you would say:

buildperl.pl --prefix='/opt/<perl>' --perl=5.004_05 --config=default

To build debugging configurations of all perls in the source directory and install them to /opt, use:

buildperl.pl --prefix='/opt/<perl>' --config=debug

To build all configurations for perl-5.8.5 and perl-5.8.6, test them and don't install them, run:

buildperl.pl --perl=5.8.5 --perl=5.8.6 --test --noinstall

To build and install a single version of perl with special configuration options, use:

buildperl.pl --perl=5.6.0 --prefix=/opt/p560ld --oneshot -- -des \
                                                 -Duselongdouble

COPYRIGHT

Copyright (c) 2004-2013, Marcus Holland-Moritz.

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

SEE ALSO

See Devel::PPPort and HACKERS.