Bug 1422825 (CVE-2017-6001) - CVE-2017-6001 kernel: Race condition between multiple sys_perf_event_open() calls
Summary: CVE-2017-6001 kernel: Race condition between multiple sys_perf_event_open() c...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-6001
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: 1422827 1434751 1434752 1434753 1434754
Blocks: 1422826
TreeView+ depends on / blocked
 
Reported: 2017-02-16 10:59 UTC by Andrej Nemec
Modified: 2021-09-09 12:08 UTC (History)
32 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
It was found that the original fix for CVE-2016-6786 was incomplete. There exist a race between two concurrent sys_perf_event_open() calls when both try and move the same pre-existing software group into a hardware context.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:07:46 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 18:22:09 UTC
Red Hat Product Errata RHSA-2017:2077 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 18:13:37 UTC
Red Hat Product Errata RHSA-2017:2669 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-07 00:36:52 UTC
Red Hat Product Errata RHSA-2018:1854 0 None None None 2018-06-19 04:47:25 UTC

Description Andrej Nemec 2017-02-16 10:59:29 UTC 
It was found that the original fix for CVE-2016-6786 was incomplete. There exist a race between two concurrent sys_perf_event_open() calls when both try and move the same pre-existing software group into a hardware context.

References:

https://marc.info/?l=linux-kernel&m=148370849716035
http://seclists.org/oss-sec/2017/q1/446

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=321027c1fe77f892f4ea07846aeae08cefbbb290
Comment 1 Andrej Nemec 2017-02-16 11:03:17 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1422827]
Comment 2 Justin M. Forbes 2017-02-16 12:57:40 UTC 
This was fixed in the 4.9.7 stable update available to all Fedora releases.
Comment 4 Vladis Dronov 2017-03-22 09:49:35 UTC 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 as the perf subsystem where the flaw was found is not present in this product.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
Comment 10 errata-xmlrpc 2017-08-01 19:13:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
Comment 11 errata-xmlrpc 2017-08-02 07:53:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
Comment 12 errata-xmlrpc 2017-09-06 20:40:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669
Comment 13 errata-xmlrpc 2018-06-19 04:47:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854
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