CVE-2016-8858

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

29.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 98.0% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2016-12-09 00:00Z9 YR AGO

Last updated

2026-05-29 20:45Z5 MO AGO

Reserved

2016-10-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-399

Data version

5.2

Document digest

7d0ecb560596ac75473f403fa73908bcc7c5375063469666202f4672c7e6f917

• www.securityfocus.com93776http://www.securityfocus.com/bid/93776vdb-entry
• www.openwall.com[oss-security] 20161020 Re: Re: CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSHhttp://www.openwall.com/lists/oss-security/2016/10/20/1mailing-list
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20180201-0001/
• www.openwall.com[oss-security] 20161019 CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSHhttp://www.openwall.com/lists/oss-security/2016/10/19/3mailing-list
• cvsweb.openbsd.orghttp://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h
• github.comhttps://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad
• ftp.openbsd.orghttps://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig
• security.freebsd.orgFreeBSD-SA-16:33https://security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.ascvendor-advisory
• www.securitytracker.com1037057http://www.securitytracker.com/id/1037057vdb-entry
• security.gentoo.orgGLSA-201612-18https://security.gentoo.org/glsa/201612-18vendor-advisory
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1384860
• cvsweb.openbsd.orghttp://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf