CVE-2015-6564

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.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

0.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 48.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2015-08-24 00:00Z11 YR AGO

Last updated

2026-05-27 16:18Z5 MO AGO

Reserved

2015-08-21

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.0)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant
• CWE-264

Data version

5.2

Document digest

7b574416dbd4ee253f44888d6444b3235409577dbdc44ab21e7561176c607372

• www.openwall.com[oss-security] 20150821 Re: CVE request - OpenSSH 6.9 PAM privilege separation vulnerabilitieshttp://www.openwall.com/lists/oss-security/2015/08/22/1mailing-list
• lists.fedoraproject.orgFEDORA-2015-13469http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.htmlvendor-advisory
• www.securityfocus.com76317http://www.securityfocus.com/bid/76317vdb-entry
• www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
• security.gentoo.orgGLSA-201512-04https://security.gentoo.org/glsa/201512-04vendor-advisory
• kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10136
• www.openssh.comhttp://www.openssh.com/txt/release-7.0
• www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
• github.comhttps://github.com/openssh/openssh-portable/commit/5e75f5198769056089fb06c4d738ab0e5abc66f7
• rhn.redhat.comRHSA-2016:0741http://rhn.redhat.com/errata/RHSA-2016-0741.htmlvendor-advisory
• seclists.org20150813 BFS-SA-2015-002: OpenSSH PAM Privilege Separation Vulnerabilitieshttp://seclists.org/fulldisclosure/2015/Aug/54mailing-list
• www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
• lists.opensuse.orgSUSE-SU-2015:1581http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.htmlvendor-advisory
• lists.debian.org[debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security updatehttps://lists.debian.org/debian-lts-announce/2018/09/msg00010.htmlmailing-list
• www.broadcom.comhttps://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-764
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf