Bug 2418105

Summary:	CVE-2025-64076 python-cbor2: cbor2: Integer Underflow and Memory Leak leading to Denial of Service [fedora-42]
Product:	[Fedora] Fedora	Reporter:	Praise Ogwuche <pogwuche>
Component:	python-cbor2	Assignee:	Carl George 🤠 <carlwgeorge>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	42	CC:	carl, carlwgeorge, python-packagers-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---	Flags:	fedora-admin-xmlrpc: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["baada591-dbb9-4e1a-b074-67ea541acfee"]}
Fixed In Version:	python-cbor2-5.6.5-8.fc42	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-04-22 11:41:14 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:	2415716

Description Praise Ogwuche 2025-12-01 20:50:02 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.

The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams

Comment 1 Fedora Update System 2026-04-11 00:28:22 UTC

FEDORA-2026-0afc953516 (python-cbor2-5.6.5-8.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-0afc953516

Comment 2 Fedora Update System 2026-04-13 02:21:55 UTC

FEDORA-2026-0afc953516 has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0afc953516`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0afc953516

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-04-22 11:41:14 UTC

FEDORA-2026-0afc953516 (python-cbor2-5.6.5-8.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.