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CVE-2015-6564
Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms…
- 7.0HighCVSS base score
- 0.60%Exploitation in 30 daysEPSS · top 51% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
Timeline
ID reserved
By mitre
- 3 days later
· 3 days later
Published
- 11 years later
· 11 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.60% · top 51% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Affected products
n/a
- affected n/a
References
References16
- [oss-security] 20150821 Re: CVE request - OpenSSH 6.9 PAM privilege separation vulnerabilities (opens in a new tab)mailing-listx_transferred
- FEDORA-2015-13469 (opens in a new tab)vendor-advisoryx_transferred
- 76317 (opens in a new tab)vdb-entryx_transferred
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html (opens in a new tab)x_transferred
- GLSA-201512-04 (opens in a new tab)vendor-advisoryx_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10136 (opens in a new tab)x_transferred
- http://www.openssh.com/txt/release-7.0 (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html (opens in a new tab)x_transferred
- https://github.com/openssh/openssh-portable/commit/5e75f5198769056089fb06c4d738ab0e5abc66f7 (opens in a new tab)x_transferred
- RHSA-2016:0741 (opens in a new tab)vendor-advisoryx_transferred
- 20150813 BFS-SA-2015-002: OpenSSH PAM Privilege Separation Vulnerabilities (opens in a new tab)mailing-listx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html (opens in a new tab)x_transferred
- SUSE-SU-2015:1581 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security update (opens in a new tab)mailing-listx_transferred
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-764 (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2015-6503 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2015-6564)Record last updated .