Bug 2556468

Summary:	CVE-2026-110681 perl-Cpanel-JSON-XS: Use of parent interpreter scalars in cloned threads [fedora-all]
Product:	[Fedora] Fedora	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:	rawhide	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.fc43 perl-Cpanel-JSON-XS-4.80-1.fc44 perl-Cpanel-JSON-XS-4.80-1.fc45	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-24 16:16:51 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 20:49:14 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 09:12:58 UTC

FEDORA-2026-ad8dfeadc9 (perl-Cpanel-JSON-XS-4.80-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ad8dfeadc9

Comment 2 Fedora Update System 2026-10-21 09:15:43 UTC

FEDORA-2026-3ab4727120 (perl-Cpanel-JSON-XS-4.80-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3ab4727120

Comment 3 Fedora Update System 2026-10-21 09:18:26 UTC

FEDORA-2026-4447e52d23 (perl-Cpanel-JSON-XS-4.80-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-4447e52d23

Comment 4 Fedora Update System 2026-10-24 16:16:51 UTC

FEDORA-2026-4447e52d23 (perl-Cpanel-JSON-XS-4.80-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 5 Fedora Update System 2026-10-24 16:36:33 UTC

FEDORA-2026-3ab4727120 (perl-Cpanel-JSON-XS-4.80-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-10-31 18:42:30 UTC

FEDORA-2026-ad8dfeadc9 (perl-Cpanel-JSON-XS-4.80-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.