Bug 2509396 - CVE-2026-39831 prometheus-podman-exporter: golang.org/x/crypto/ssh: Security key bypass due to missing user presence check [fedora-all]
Summary: CVE-2026-39831 prometheus-podman-exporter: golang.org/x/crypto/ssh: Security ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: prometheus-podman-exporter
Version: 45
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Navid Yaghoobi
QA Contact:
URL:
Whiteboard: {"flaws": ["1537af73-e36d-4a46-a18e-3...
Depends On:
Blocks: CVE-2026-39831
TreeView+ depends on / blocked
 
Reported: 2026-07-30 14:28 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-09-22 00:17 UTC (History)
2 users (show)

Fixed In Version: prometheus-podman-exporter-2.0.0-1.fc45
Clone Of:
Environment:
Last Closed: 2026-09-22 00:17:00 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2026-07-30 14:28:17 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 15:42:47 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 2026-09-13 09:39:53 UTC 
FEDORA-2026-8590121cf7 (prometheus-podman-exporter-2.0.0-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-8590121cf7
Comment 3 Fedora Update System 2026-09-14 01:29:25 UTC 
FEDORA-2026-8590121cf7 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-2026-8590121cf7`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8590121cf7

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 4 Fedora Update System 2026-09-22 00:17:00 UTC 
FEDORA-2026-8590121cf7 (prometheus-podman-exporter-2.0.0-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.
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