Bug 2556483

Summary:	CVE-2026-110685 perl-Cpanel-JSON-XS: Memory leak in decode_tag when THAW method dies [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": ["5035cd4b-dceb-40d7-b78c-5f39f8c0f74a"]}
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 00:30:02 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:	2555764

Description Guilherme de Almeida Suckevicz 2026-10-20 20:52:01 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 leak the decoded arguments of a tagged value when its THAW method dies in decode_tag.

With allow_tags, a tagged value's class name and argument array are decoded and passed to the class's THAW method. Both are released only after THAW returns, so a THAW that dies leaves the whole decoded argument structure allocated.

Each rejected document leaks data of a size the sender chooses, so a process that catches the error and keeps running exhausts its memory.

Comment 1 Fedora Update System 2026-10-21 07:41:44 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 08:03:46 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 08:32:25 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 08:46:33 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 08:50:39 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 00:30:02 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 15:43:17 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 15:55:51 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 15:59:52 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 16:19:53 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 16:29:03 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.