CVE-2015-6927

Exp

vzctl before 4.9.4 determines the virtual environment (VE) layout based on the presence of root.hdd/DiskDescriptor.xml in the VE private directory, which allows local simfs container (CT) root users to change the root password for arbitrary ploop containers, as demonstrated by a symlink attack on the ploop container root.hdd file and then access a control panel.

Published: 2015-09-28 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-6927 is rated Exploit Available (50/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.50%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-6927

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-6927

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.50% +0.43%
2 2023-03-07 0.95% 0.07% -0.88%
3 2022-02-04 — 0.95% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-6927

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.6 2.0 LOW
AV:L/AC:L/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 4.9 [email protected]

Weakness enumeration for CVE-2015-6927

OS Trackers for CVE-2015-6927

vendor priority summary link
gentoo normal CVE-2015-6927: 1 GLSA(s) (201701-30), 1 atom(s) (sys-cluster/vzctl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-6927
ubuntu low CVE-2015-6927 low priority: Ubuntu including 1 source packages (vzctl), 12 status rows across 12 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): ignored 5, not-affected 5, DNE 1, released 1. https://ubuntu.com/security/CVE-2015-6927

Affected software / configurations for CVE-2015-6927

Vendor Product Version Raw CPE
openvz vzctl <= 4.9.3 cpe:2.3:a:openvz:vzctl:*:*:*:*:*:*:*:*

References for CVE-2015-6927

cvelogic Threat Intelligence