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Fencer Vulns
critical 9.1

CVE-2016-8649 json

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 descrip…

published 2017-05-01 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9488

cvss
9.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

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.

Patch / fix

  • linuxcontainers lxc 1.0.9, 2.0.6
  • lxc Debian 14, Debian 13, Debian 12 1:2.0.6-1

debian advisories DEBIAN-CVE-2016-8649

  • lxc Ubuntu 14.04 LTS 1.0.8-0ubuntu0.4
  • lxc Ubuntu 16.04 LTS 2.0.5-0ubuntu1~ubuntu16.04.3

ubuntu advisories UBUNTU-CVE-2016-8649

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • lxc openSUSE Tumbleweed 2.0.4-2.1

opensuse advisories openSUSE-SU-2024:10416-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-8649 updated cvss 7.8

lxc: lxc-attach to malicious container allows access to host

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.81% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • n/a LXC before 1.0.9 and 2.x before 2.0.6

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.