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Fedora 43: perl-Cpanel-JSON-XS Critical Integer Overflow Fix CVE-2025-40929

fedora
Calendar Grey September 12, 2025
Dist Fedora Esm H88
Fedora 43 has released a significant update addressing an integer overflow issue in the perl-Cpanel-JSON-XS parser. Users should review this important enhancement for security.
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 update information integer overflow JSON parsing

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

References

Fedora Update Notification FEDORA-2025-ce67f2ffd1 2025-09-12 19:20:52.462332+00:00 Name : perl-Cpanel-JSON-XS Product : Fedora 43 Version : 4.40 Release : 1.fc43 URL : https://metacpan.org/release/Cpanel-JSON-XS Summary : JSON::XS for Cpanel, fast and correct serializing Description : 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 Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-ce67f2ffd1' 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
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Name: perl-Cpanel-JSON-XS
Product: Fedora 43
Version: 4.40
Release: 1.fc43
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 update information integer overflow JSON parsing

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