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Critical Integer Overflow Vulnerability in perl-Cpanel-JSON-XS on Fedora 42

fedora
Calendar Grey September 18, 2025
Dist Fedora Esm H88
Fedora 42 has upgraded the Cpanel-JSON-XS package to fix an integer overflow vulnerability that could affect JSON data handling. Update now for improved security and validation
This update fixes an issue where a specially-crafted JSON input could cause an integer overflow leading to a crash in the program parsing the JSON (CVE-2025-40929).

Summary

This module converts Perl data structures to JSON and vice versa. Its

primary goal is to be correct and its secondary goal is to be fast. To

reach the latter goal it was written in C.

Update Information:

This update fixes an issue where a specially-crafted JSON input could cause an integer overflow leading to a crash in the program parsing the JSON (CVE-2025-40929).

Topics%20covered

Topics Covered

security advisory fedora critical integer overflow json parser severe crash

Change Log

* Tue Sep 9 2025 Paul Howarth - 4.40-1 - Update to 4.40 - Fix overflow with overlong numbers, fuzzing only (CVE-2025-40929) - Detect more malformed numbers, with two decimal points - Pin Github actions to latest @v via pinact run -u * Fri Jul 25 2025 Fedora Release Engineering - 4.39-5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild * Tue Jul 8 2025 Jitka Plesnikova - 4.39-4 - Perl 5.42 re-rebuild of bootstrapped packages * Mon Jul 7 2025 Jitka Plesnikova - 4.39-3 - Perl 5.42 rebuild

References


[ 1 ] Bug #2393917 - CVE-2025-40929 perl-Cpanel-JSON-XS: integer buffer overflow causing a segfault when parsing crafted JSON [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2393917

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-f4f4dae8f2' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
critical
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Critical

Name: perl-Cpanel-JSON-XS
Product: Fedora 42
Version: 4.40
Release: 1.fc42
URL: https://metacpan.org/release/Cpanel-JSON-XS
Summary: JSON::XS for Cpanel, fast and correct serializing

Topics%20covered

Topics Covered

security advisory fedora critical integer overflow json parser severe crash

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