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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. Net::IDN::Punycode versions from 2.302 before 2.590 for Perl leak the output buffer on every rejected label in decode_punycode. The XS backend allocates the scalar it returns before it validates the input, sizing the buffer at twice the input length. The scalar is released only on the success path, so each of the three croaks that reject a label leaves the scalar and its buffer allocated. Nothing bounds the label length in the to-Unicode direction, since the 63-byte DNS limit is checked only when converting to ASCII. Only the XS backend is affected. A sender who supplies invalid labels grows the process by twice the label length per rejected call, with no successful call needed.
FEDORA-2026-3100f3c686 (perl-Net-IDN-Encode-2.502-1.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-3100f3c686
FEDORA-2026-4aec7019eb (perl-Net-IDN-Encode-2.502-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-4aec7019eb
FEDORA-2026-2aac921262 (perl-Net-IDN-Encode-2.502-1.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aac921262
FEDORA-2026-2aac921262 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-2aac921262` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aac921262 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-3100f3c686 has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-3100f3c686` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3100f3c686 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-4aec7019eb has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-4aec7019eb` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-4aec7019eb See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-3100f3c686 (perl-Net-IDN-Encode-2.502-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-4aec7019eb (perl-Net-IDN-Encode-2.502-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.