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Fedora 43 : perl-Net-IDN-Encode (2026-3cb8ce0117)

critical Nessus Plugin ID 378039

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3cb8ce0117 advisory.

 Version 2.600 of Net::IDN::Encode fixes multiple CVEs:
 * CVE-2026-74766, a heap use-after-free in the XS decode_punycode
 * CVE-2026-74765, an integer overflow and out-of-bounds read in the XS encode_punycode
 * CVE-2026-87078, memory leaks when the XS functions reject input
 * CVE-2026-87079, quadratic decoding of large labels
 * CVE-2026-87080, the pure-Perl decoder accepting a truncated label
 * CVE-2026-87081, quadratic encoding of overlong labels in to_ascii
 * CVE-2026-87082, the XS encode_punycode looping for ever on malformed UTF-8 input

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected perl-Net-IDN-Encode package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-3cb8ce0117

Plugin Details

Severity: Critical

ID: 378039

File Name: fedora_2026-3cb8ce0117.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/10/2026

Updated: 11/10/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.47

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C

CVSS Score Source: CVE-2026-87080

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:perl-net-idn-encode

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/1/2026

Vulnerability Publication Date: 9/22/2026

Reference Information

CVE: CVE-2026-74765, CVE-2026-74766, CVE-2026-87078, CVE-2026-87079, CVE-2026-87080, CVE-2026-87081, CVE-2026-87082