Bug 2553354

Summary:	CVE-2025-58181 nng: 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:	nng	Assignee:	Steven A. Falco <stevenfalco>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	jan.ruzicka, stevenfalco
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8278f407-34af-4a72-8643-89d8dc3646ca"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-15 18:42:48 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:	2415997

Description Avinash Hanwate 2026-10-15 10:54:19 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 Steven A. Falco 2026-10-15 18:42:48 UTC

This is a false positive mapping. CVE-2025-58181 is a vulnerability specific to the Go SSH package (golang.org/x/crypto/ssh). The Fedora nng package is a pure C library and does not use or bundle Go's crypto package.