Bug 2553365

Summary: CVE-2025-58181 trayscale: golang.org/x/crypto/ssh: Denial of Service via unbounded memory consumption in GSSAPI authentication [fedora-43]
Product: [Fedora] Fedora Reporter: Avinash Hanwate <ahanwate>
Component: trayscaleAssignee: Jonathan Wright <jonathan>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 43CC: go-sig, jonathan
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["8278f407-34af-4a72-8643-89d8dc3646ca"]}
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Last Closed: 2026-10-28 14:38:11 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2415997    

Description Avinash Hanwate 2026-10-15 11:02:58 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.

SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.
Comment 1 Jonathan Wright 2026-10-28 14:38:11 UTC 
Fixed in 0.21.0 in rawhide, to be released in 45 after release.  Cannot fix in Fedora <= 44 due to golang version.