{ "content": [ { "type": "text", "text": "# perl5281delta (man)\n\n## NAME\n\nperl5281delta - what is new for perl v5.28.1\n\n## DESCRIPTION\n\nThis document describes differences between the 5.28.0 release and the 5.28.1 release.\n\n## Sections\n\n- **NAME**\n- **DESCRIPTION**\n- **Security** (5 subsections)\n- **Acknowledgements** (2 subsections)\n- **SEE ALSO**\n\nUse structuredContent.sections for detailed options, examples, and full documentation.\n" } ], "structuredContent": { "command": "perl5281delta", "section": "", "mode": "man", "summary": "perl5281delta - what is new for perl v5.28.1", "synopsis": null, "tldr_summary": null, "tldr_examples": [], "tldr_source": null, "flags": [], "examples": [], "see_also": [], "section_outline": [ { "name": "NAME", "lines": 2, "subsections": [] }, { "name": "DESCRIPTION", "lines": 5, "subsections": [] }, { "name": "Security", "lines": 1, "subsections": [ { "name": "[CVE-2018-18311] Integer overflow leading to buffer overflow and segmentation fault", "lines": 12 }, { "name": "Incompatible Changes", "lines": 3 }, { "name": "Modules and Pragmata", "lines": 1 }, { "name": "Updated Modules and Pragmata", "lines": 2 }, { "name": "Selected Bug Fixes", "lines": 12 } ] }, { "name": "Acknowledgements", "lines": 24, "subsections": [ { "name": "Reporting Bugs", "lines": 13 }, { "name": "Give Thanks", "lines": 7 } ] }, { "name": "SEE ALSO", "lines": 11, "subsections": [] } ], "sections": { "NAME": { "content": "perl5281delta - what is new for perl v5.28.1\n", "subsections": [] }, "DESCRIPTION": { "content": "This document describes differences between the 5.28.0 release and the 5.28.1 release.\n\nIf you are upgrading from an earlier release such as 5.26.0, first read perl5280delta, which\ndescribes differences between 5.26.0 and 5.28.0.\n", "subsections": [] }, "Security": { "content": "", "subsections": [ { "name": "[CVE-2018-18311] Integer overflow leading to buffer overflow and segmentation fault", "content": "Integer arithmetic in \"Perlmysetenv()\" could wrap when the combined length of the\nenvironment variable name and value exceeded around 0x7fffffff. This could lead to writing\nbeyond the end of an allocated buffer with attacker supplied data.\n\n[GH #16560] \n\n[CVE-2018-18312] Heap-buffer-overflow write in Sregatom (regcomp.c)\nA crafted regular expression could cause heap-buffer-overflow write during compilation,\npotentially allowing arbitrary code execution.\n\n[GH #16649] \n" }, { "name": "Incompatible Changes", "content": "There are no changes intentionally incompatible with 5.28.0. If any exist, they are bugs,\nand we request that you submit a report. See \"Reporting Bugs\" below.\n" }, { "name": "Modules and Pragmata", "content": "" }, { "name": "Updated Modules and Pragmata", "content": "• Module::CoreList has been upgraded from version 5.20180622 to 5.2018112928.\n" }, { "name": "Selected Bug Fixes", "content": "• Perl 5.28 introduced an \"index()\" optimization when comparing to -1 (or indirectly, e.g.\n>= 0). When this optimization was triggered inside a \"when\" clause it caused a warning\n(\"Argument %s isn't numeric in smart match\"). This has now been fixed. [GH #16626]\n\n\n• Matching of decimal digits in script runs, introduced in Perl 5.28, had a bug that led to\n\"1\\N{THAI DIGIT FIVE}\" matching \"/^(*sr:\\d+)$/\" when it should not. This has now been\nfixed.\n\n• The new in-place editing code no longer leaks directory handles. [GH #16602]\n\n" } ] }, "Acknowledgements": { "content": "Perl 5.28.1 represents approximately 5 months of development since Perl 5.28.0 and contains\napproximately 6,100 lines of changes across 44 files from 12 authors.\n\nExcluding auto-generated files, documentation and release tools, there were approximately 700\nlines of changes to 12 .pm, .t, .c and .h files.\n\nPerl continues to flourish into its fourth decade thanks to a vibrant community of users and\ndevelopers. The following people are known to have contributed the improvements that became\nPerl 5.28.1:\n\nAaron Crane, Abigail, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, David Mitchell,\nJames E Keenan, John SJ Anderson, Karen Etheridge, Karl Williamson, Sawyer X, Steve Hay, Tony\nCook.\n\nThe list above is almost certainly incomplete as it is automatically generated from version\ncontrol history. In particular, it does not include the names of the (very much appreciated)\ncontributors who reported issues to the Perl bug tracker.\n\nMany of the changes included in this version originated in the CPAN modules included in\nPerl's core. We're grateful to the entire CPAN community for helping Perl to flourish.\n\nFor a more complete list of all of Perl's historical contributors, please see the AUTHORS\nfile in the Perl source distribution.\n", "subsections": [ { "name": "Reporting Bugs", "content": "If you find what you think is a bug, you might check the perl bug database at\n . There may also be information at , the Perl\nHome Page.\n\nIf you believe you have an unreported bug, please run the perlbug program included with your\nrelease. Be sure to trim your bug down to a tiny but sufficient test case. Your bug report,\nalong with the output of \"perl -V\", will be sent off to perlbug@perl.org to be analysed by\nthe Perl porting team.\n\nIf the bug you are reporting has security implications which make it inappropriate to send to\na publicly archived mailing list, then see \"SECURITY VULNERABILITY CONTACT INFORMATION\" in\nperlsec for details of how to report the issue.\n" }, { "name": "Give Thanks", "content": "If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by\nrunning the \"perlthanks\" program:\n\nperlthanks\n\nThis will send an email to the Perl 5 Porters list with your show of thanks.\n" } ] }, "SEE ALSO": { "content": "The Changes file for an explanation of how to view exhaustive details on what changed.\n\nThe INSTALL file for how to build Perl.\n\nThe README file for general stuff.\n\nThe Artistic and Copying files for copyright information.\n\n\n\nperl v5.34.0 2025-07-25 PERL5281DELTA(1)", "subsections": [] } } } }