Bug 2553410

Summary:	CVE-2026-4360 mingw-python3: Python Tarfile: Unexpected file ownership when extracting hardlinks [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Avinash Hanwate <ahanwate>
Component:	mingw-python3	Assignee:	Sandro Mani <manisandro>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	manisandro
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["1be78cfa-e50e-4c50-9a7c-29da3864f77b"]}
Fixed In Version:	mingw-python3-3.11.17-1.fc44 mingw-python3-3.11.17-1.fc45	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-27 01:14:52 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:	2494987

Description Avinash Hanwate 2026-10-15 12:41:04 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.

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

Comment 1 Fedora Update System 2026-10-18 13:02:59 UTC

FEDORA-2026-7740bc798f (mingw-python3-3.11.17-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-7740bc798f

Comment 2 Fedora Update System 2026-10-18 13:03:28 UTC

FEDORA-2026-aa5c18e9be (mingw-python3-3.11.17-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-aa5c18e9be

Comment 3 Fedora Update System 2026-10-19 01:53:33 UTC

FEDORA-2026-7740bc798f has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-7740bc798f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-7740bc798f

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

Comment 4 Fedora Update System 2026-10-19 02:13:40 UTC

FEDORA-2026-aa5c18e9be has been pushed to the Fedora 44 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-aa5c18e9be`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-aa5c18e9be

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

Comment 5 Fedora Update System 2026-10-27 01:14:52 UTC

FEDORA-2026-aa5c18e9be (mingw-python3-3.11.17-1.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 18:46:26 UTC

FEDORA-2026-7740bc798f (mingw-python3-3.11.17-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.