Bug 1392439 (CVE-2016-9191) - CVE-2016-9191 kernel: Local DoS via cgroup offline code
Summary: CVE-2016-9191 kernel: Local DoS via cgroup offline code
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-9191
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1392440
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-11-07 14:06 UTC by Andrej Nemec
Modified: 2019-09-29 13:59 UTC (History)
29 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-06-08 03:01:51 UTC
Embargoed:

Attachments (Terms of Use)

Description Andrej Nemec 2016-11-07 14:06:16 UTC 
A malicious user who can run an arbitrary image with a non-privileged user
in a Container-as-a-service cloud environment could use the exploit to
deadlock the container nodes to deny the service for other users.

This is confirmed to affect the latest mainline kernel (4.9-rc3) using this
kernel config, http://people.redhat.com/qcai/tmp/config-god-4.9rc2
and as old as v3.17. RHEL 7.3 kernel is not affected.

References:

http://seclists.org/oss-sec/2016/q4/340
Comment 1 Andrej Nemec 2016-11-07 14:07:09 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1392440]
Comment 2 Andrej Nemec 2017-01-30 08:35:45 UTC 
Upstream patch:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=93362fa47fe98b62e4a34ab408c4a418432e7939
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