Bug 2530678

Summary: CVE-2026-78662 rootlesskit: golang.org/x/crypto/ssh: Denial of Service via channel request flooding [fedora-all]
Product: [Fedora] Fedora Reporter: jkelly <jkelly>
Component: rootlesskitAssignee: Gordon Messmer <gordon.messmer>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: asm, bradley.g.smith, gordon.messmer, go-sig, maxwell
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["e558e301-1905-4049-a2bf-4abd80cf6714"]}
Fixed In Version: rootlesskit-3.2.0-1.fc46 rootlesskit-3.2.0-1.fc45 rootlesskit-3.2.0-1.fc44 rootlesskit-3.2.0-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-09-20 22:13:48 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: 2528026    

Description jkelly 2026-09-09 10:28:07 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.

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

Comment 1 Fedora Update System 2026-09-20 22:10:27 UTC
FEDORA-2026-ec725c24c1 (rootlesskit-3.2.0-1.fc46) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ec725c24c1

Comment 2 Fedora Update System 2026-09-20 22:13:48 UTC
FEDORA-2026-ec725c24c1 (rootlesskit-3.2.0-1.fc46) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 3 Fedora Update System 2026-09-21 00:58:21 UTC
FEDORA-2026-6b8872b8ac (rootlesskit-3.2.0-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b8872b8ac

Comment 4 Fedora Update System 2026-09-21 03:42:20 UTC
FEDORA-2026-3e60aed77e (rootlesskit-3.2.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e60aed77e

Comment 5 Fedora Update System 2026-09-21 13:48:27 UTC
FEDORA-2026-f5733c1dd0 (rootlesskit-3.2.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5733c1dd0

Comment 6 Fedora Update System 2026-09-22 01:34:24 UTC
FEDORA-2026-6b8872b8ac 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-2026-6b8872b8ac`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b8872b8ac

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

Comment 7 Fedora Update System 2026-09-22 01:55:50 UTC
FEDORA-2026-3e60aed77e 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-2026-3e60aed77e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e60aed77e

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

Comment 8 Fedora Update System 2026-09-22 02:20:59 UTC
FEDORA-2026-f5733c1dd0 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-f5733c1dd0`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5733c1dd0

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

Comment 9 Fedora Update System 2026-09-30 00:15:34 UTC
FEDORA-2026-6b8872b8ac (rootlesskit-3.2.0-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-09-30 00:51:47 UTC
FEDORA-2026-3e60aed77e (rootlesskit-3.2.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-09-30 01:11:01 UTC
FEDORA-2026-f5733c1dd0 (rootlesskit-3.2.0-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.