Bug 2415997 (CVE-2025-58181)

Summary: CVE-2025-58181 golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via unbounded memory consumption in GSSAPI authentication
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aazores, alcohan, alebedev, amctagga, anjoseph, ansmith, aoconnor, bdettelb, bniver, carogers, cmah, crizzo, dakwon, dhanak, dkeler, doconnor, drosa, dschmidt, dsimansk, dymurray, eaguilar, ebaron, eborisov, eglynn, erezende, fdeutsch, flucifre, gmeno, gparvin, groman, haoli, hkataria, jajackso, jbalunas, jburrell, jcammara, jeder, jjoyce, jkoehler, jlanda, jmatthew, jmitchel, jneedle, jolong, jprabhak, jpretori, jschluet, kegrant, kingland, koliveir, kshier, kverlaen, lball, lhh, lphiri, mabashia, manissin, matzew, mbenjamin, mburns, mgarciac, mhackett, mnovotny, ngough, oramraz, owatkins, pahickey, pbraun, peholase, pjindal, rhaigner, rhel-process-autobot, rjohnson, sausingh, sdawley, shvarugh, simaishi, smcdonal, smullick, sostapov, stcannon, stirabos, suppawar, teagle, tfister, thason, thavo, vereddy, veshanka, vkarehfa, watson-tool-maintainers, whayutin, wtam, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in golang.org/x/crypto/ssh. An attacker can exploit this vulnerability by sending specially crafted GSSAPI (Generic Security Service Application Program Interface) authentication requests to an SSH (Secure Shell) server. The server fails to validate the number of mechanisms specified in these requests, leading to unbounded memory consumption. This can result in a Denial of Service (DoS), making the SSH server unavailable to legitimate users.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2424423, 2424424, 2424425, 2424426    
Bug Blocks:    

Description OSIDB Bzimport 2025-11-19 21:01:19 UTC
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.