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Vulnerability record · CVE-2016-8649 · published 1 May 2017

CVE-2016-8649: Linuxcontainers lxc permissions and access controls vulnerability

Linuxcontainers · Lxc

lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's filesystem via the openat() family of syscalls.

9.1 CVSS 3.0 Critical EPSS 2.8% · top 14.0% CWE-264 · Permissions and access controls
9.1CVSS 3.0 base score, v2 9.0
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's filesystem via the openat() family of syscalls.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/94498 Third Party AdvisoryVDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845465 Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1639345 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1398242 Issue TrackingPatch
https://github.com/lxc/lxc/commit/81f466d05f2a89cb4f122ef7f593ff3f279b165c PatchVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2016-8649 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/94498 Third Party AdvisoryVDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845465 Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1639345 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1398242 Issue TrackingPatch
https://github.com/lxc/lxc/commit/81f466d05f2a89cb4f122ef7f593ff3f279b165c PatchVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2016-8649 Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-8649), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.