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Bug 1544612 - (CVE-2018-6927) CVE-2018-6927 kernel: Integer overflow in futex.c:futux_requeue can lead to denial of service or unspecified impact
CVE-2018-6927 kernel: Integer overflow in futex.c:futux_requeue can lead to d...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20180212,reported=2...
: Security
Depends On: 1547584 1544614 1547583 1547585 1547586 1547587
Blocks: 1544615
  Show dependency tree / graph
 
Reported: 2018-02-12 22:59 EST by Sam Fowler
Modified: 2018-08-30 00:55 EDT (History)
44 users (show)

See Also:
Fixed In Version: kernel 4.14.15
Doc Type: Bug Fix
Doc Text:
The futex_requeue function in kernel/futex.c in the Linux kernel, before 4.14.15, might allow attackers to cause a denial of service (integer overflow) or possibly have unspecified other impacts by triggering a negative wake or requeue value. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0654 None None None 2018-04-10 01:13 EDT
Red Hat Product Errata RHSA-2018:0676 None None None 2018-04-10 04:19 EDT
Red Hat Product Errata RHSA-2018:1062 None None None 2018-04-10 05:43 EDT

  None (edit)
Description Sam Fowler 2018-02-12 22:59:50 EST 
The futex_requeue function in kernel/futex.c in the Linux kernel before 4.14.15 might allow attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact by triggering a negative wake or requeue value. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

https://marc.info/?l=linux-kernel&m=151324233331151

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fbe0e839d1e22d88810f3ee3e2f1479be4c0aa4a
Comment 1 Sam Fowler 2018-02-12 23:00:46 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1544614]
Comment 2 Justin M. Forbes 2018-02-13 07:52:00 EST 
This was fixed in the 4.14.15 stable update for Fedora
Comment 5 Vladis Dronov 2018-02-21 09:57:17 EST 
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This is not currently planned to be addressed in future updates of the product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. Future Linux kernel updates for the respective releases may address this issue.
Comment 7 errata-xmlrpc 2018-04-10 01:12:51 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0654 https://access.redhat.com/errata/RHSA-2018:0654
Comment 8 errata-xmlrpc 2018-04-10 04:19:12 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:0676
Comment 9 errata-xmlrpc 2018-04-10 05:43:08 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1062
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