Bug 2530672

Summary: CVE-2026-78662 moby-engine: golang.org/x/crypto/ssh: Denial of Service via channel request flooding [fedora-all]
Product: [Fedora] Fedora Reporter: jkelly <jkelly>
Component: moby-engineAssignee: Brad Smith <bradley.g.smith>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: bradley.g.smith, copper_fin, go-sig, madhuraggarwalofficial, maxwell, mhofmann
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["e558e301-1905-4049-a2bf-4abd80cf6714"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-01 00:03:38 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 10:27:27 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 Brad Smith 2026-10-01 00:03:38 UTC 
Not reported by govulncheck - v29.8.2