Bug 2556467

Summary:	CVE-2026-110681 perl-Cpanel-JSON-XS: Use of parent interpreter scalars in cloned threads [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	perl-Cpanel-JSON-XS	Assignee:	Paul Howarth <paul>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	paul, perl-devel
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["e6d57da2-39e9-4029-bfe8-0819b9c986b2"]}
Fixed In Version:	perl-Cpanel-JSON-XS-4.80-1.el10_4 perl-Cpanel-JSON-XS-4.80-1.el10_2 perl-Cpanel-JSON-XS-4.80-1.el10_3 perl-Cpanel-JSON-XS-4.80-1.el9 perl-Cpanel-JSON-XS-4.80-1.el8	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-24 00:29:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2555757

Description Guilherme de Almeida Suckevicz 2026-10-20 20:49:06 UTC

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.

Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread.

A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there.

A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.

Comment 1 Fedora Update System 2026-10-21 07:41:27 UTC

FEDORA-EPEL-2026-672076fdc0 (perl-Cpanel-JSON-XS-4.80-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-672076fdc0

Comment 2 Fedora Update System 2026-10-21 08:03:29 UTC

FEDORA-EPEL-2026-3b3b4740ca (perl-Cpanel-JSON-XS-4.80-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3b3b4740ca

Comment 3 Fedora Update System 2026-10-21 08:32:08 UTC

FEDORA-EPEL-2026-9b03a92984 (perl-Cpanel-JSON-XS-4.80-1.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9b03a92984

Comment 4 Fedora Update System 2026-10-21 08:46:16 UTC

FEDORA-EPEL-2026-95af75ef34 (perl-Cpanel-JSON-XS-4.80-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-95af75ef34

Comment 5 Fedora Update System 2026-10-21 08:50:24 UTC

FEDORA-EPEL-2026-b4b3dd8025 (perl-Cpanel-JSON-XS-4.80-1.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-b4b3dd8025

Comment 6 Fedora Update System 2026-10-24 00:29:41 UTC

FEDORA-EPEL-2026-672076fdc0 (perl-Cpanel-JSON-XS-4.80-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2026-10-24 15:43:04 UTC

FEDORA-EPEL-2026-672076fdc0 (perl-Cpanel-JSON-XS-4.80-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-10-24 15:55:37 UTC

FEDORA-EPEL-2026-9b03a92984 (perl-Cpanel-JSON-XS-4.80-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-24 15:59:39 UTC

FEDORA-EPEL-2026-3b3b4740ca (perl-Cpanel-JSON-XS-4.80-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-10-24 16:19:39 UTC

FEDORA-EPEL-2026-95af75ef34 (perl-Cpanel-JSON-XS-4.80-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-10-24 16:28:49 UTC

FEDORA-EPEL-2026-b4b3dd8025 (perl-Cpanel-JSON-XS-4.80-1.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.