Bug 1333712 (CVE-2016-4581) - CVE-2016-4581 kernel: Slave being first propagated copy causes oops in propagate_mnt
Summary: CVE-2016-4581 kernel: Slave being first propagated copy causes oops in propag...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-4581
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: 1333713 1335979 1338808 1338809 1338810 1338811 1338812
Blocks: 1333727
TreeView+ depends on / blocked
 
Reported: 2016-05-06 08:07 UTC by Adam Mariš
Modified: 2021-02-17 03:55 UTC (History)
30 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-08 02:51:18 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2574 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2016-11-03 12:06:10 UTC
Red Hat Product Errata RHSA-2016:2584 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2016-11-03 12:08:49 UTC

Description Adam Mariš 2016-05-06 08:07:37 UTC 
It was reported that when first propagated copy is a slave, it causes kernel oops. This oops happens with the namespace_sem held and can be triggered by non-root users.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5ec0811d30378ae104f250bfc9b3640242d81e3f
Comment 1 Adam Mariš 2016-05-06 08:08:43 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1333713]
Comment 3 Adam Mariš 2016-05-11 15:38:27 UTC 
CVE-ID request and assignment:

http://seclists.org/oss-sec/2016/q2/313

http://seclists.org/oss-sec/2016/q2/318
Comment 4 Vladis Dronov 2016-05-13 17:00:42 UTC 
Acknowledgements:

Name: Eric W. Biederman (Red Hat)
Comment 6 Fedora Update System 2016-05-14 23:22:53 UTC 
kernel-4.5.4-300.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2016-05-16 14:52:34 UTC 
kernel-4.4.9-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 8 Vladis Dronov 2016-05-23 13:11:44 UTC 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, as there is no user namespace support in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
Comment 12 Fedora Update System 2016-06-02 14:59:44 UTC 
kernel-4.5.5-201.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 13 errata-xmlrpc 2016-11-03 16:28:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 14 errata-xmlrpc 2016-11-03 19:49:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html
Comment 15 errata-xmlrpc 2016-11-03 21:34:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 16 errata-xmlrpc 2016-11-03 21:49:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html
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