Bug 2509432

Summary:	CVE-2026-39831 podman-tui: golang.org/x/crypto/ssh: Security key bypass due to missing user presence check [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	podman-tui	Assignee:	Navid Yaghoobi <n.yaghoobi.s>
Status:	MODIFIED ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	45	CC:	go-sig, n.yaghoobi.s
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["1537af73-e36d-4a46-a18e-3730b1edb0d7"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2480675

Description Guilherme de Almeida Suckevicz 2026-07-30 14:31:11 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 Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256, sk-ssh-ed25519) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

Comment 1 Aoife Moloney 2026-08-17 15:43:09 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Fedora Update System 2026-09-06 04:21:57 UTC

FEDORA-2026-14e836e595 (podman-tui-2.0.0-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-14e836e595