Bug 2509417 - CVE-2026-39831 gh: golang.org/x/crypto/ssh: Security key bypass due to missing user presence check [epel-all]
Summary: CVE-2026-39831 gh: golang.org/x/crypto/ssh: Security key bypass due to missin...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: gh
Version: epel10
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Mikel Olasagasti Uranga
QA Contact:
URL:
Whiteboard: {"flaws": ["1537af73-e36d-4a46-a18e-3...
Depends On:
Blocks: CVE-2026-39831
TreeView+ depends on / blocked
 
Reported: 2026-07-30 14:29 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-08-04 00:51 UTC (History)
4 users (show)

Fixed In Version: gh-2.97.0-2.el10_3 gh-2.97.0-2.el10_2 gh-2.97.0-2.el9
Clone Of:
Environment:
Last Closed: 2026-08-04 00:28:11 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2026-07-30 14:29:59 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 Fedora Update System 2026-07-31 09:54:33 UTC
FEDORA-EPEL-2026-1938cf6816 (gh-2.97.0-2.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1938cf6816

Comment 2 Fedora Update System 2026-07-31 09:54:44 UTC
FEDORA-EPEL-2026-d7293f0101 (gh-2.97.0-2.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d7293f0101

Comment 3 Fedora Update System 2026-07-31 09:54:55 UTC
FEDORA-EPEL-2026-9c9780d3b0 (gh-2.97.0-2.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9c9780d3b0

Comment 4 Fedora Update System 2026-08-01 15:38:53 UTC
FEDORA-EPEL-2026-9c9780d3b0 has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9c9780d3b0

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

Comment 5 Fedora Update System 2026-08-01 15:44:03 UTC
FEDORA-EPEL-2026-d7293f0101 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d7293f0101

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

Comment 6 Fedora Update System 2026-08-01 15:49:28 UTC
FEDORA-EPEL-2026-1938cf6816 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1938cf6816

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

Comment 7 Fedora Update System 2026-08-04 00:28:11 UTC
FEDORA-EPEL-2026-d7293f0101 (gh-2.97.0-2.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-08-04 00:38:41 UTC
FEDORA-EPEL-2026-9c9780d3b0 (gh-2.97.0-2.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-08-04 00:51:30 UTC
FEDORA-EPEL-2026-1938cf6816 (gh-2.97.0-2.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.