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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. MIME::Words versions before 5.521 for Perl allow memory exhaustion via repeated "=?" sequences in decode_mimewords. For each "=?" that does not start a complete encoded word, decode_mimewords appends an error message containing the whole input string to $@. A boundary of 8,000 "=?" pairs (16,000 bytes) adds 8,000 copies of itself to $@, about 128 MB. From version 5.518, MIME::Parser decodes every multipart boundary this way, so a remote sender can exhaust the memory of the parsing process with one Content-Type header.
FEDORA-2026-51fdfb7476 (perl-MIME-tools-5.522-1.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-51fdfb7476
FEDORA-2026-0e79d6ad13 (perl-MIME-tools-5.522-1.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-0e79d6ad13
FEDORA-2026-a415b3bf48 (perl-MIME-tools-5.522-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-a415b3bf48
FEDORA-2026-51fdfb7476 (perl-MIME-tools-5.522-1.fc45) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-0e79d6ad13 (perl-MIME-tools-5.522-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-a415b3bf48 (perl-MIME-tools-5.522-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.