Bug 2456379

Summary:	CVE-2026-39395 singularity-ce: Cosign: Incorrect attestation verification due to malformed payloads or mismatched predicate types [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Vipul Nair <vinair>
Component:	singularity-ce	Assignee:	David Trudgian <dtrudg>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	dtrudg, dwd, go-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["1640bd01-a103-426f-be48-73fef4418dba"]}
Fixed In Version:	singularity-ce-4.4.2-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-06-19 01:09:40 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:	2456254

Description Vipul Nair 2026-04-08 08:56:08 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.

Comment 1 Fedora Update System 2026-06-10 08:50:27 UTC

FEDORA-2026-5358fb95a0 (singularity-ce-4.4.2-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5358fb95a0

Comment 2 Fedora Update System 2026-06-11 01:30:21 UTC

FEDORA-2026-5358fb95a0 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-5358fb95a0`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5358fb95a0

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

Comment 3 Fedora Update System 2026-06-19 01:09:40 UTC

FEDORA-2026-5358fb95a0 (singularity-ce-4.4.2-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.