Bug 1510399 (CVE-2017-15306) - CVE-2017-15306 Kernel: KVM: oops when checking KVM_CAP_PPC_HTM on PPC platform
Summary: CVE-2017-15306 Kernel: KVM: oops when checking KVM_CAP_PPC_HTM on PPC platform
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-15306
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: 1510400 1510403 1510404
Blocks: 1510302
TreeView+ depends on / blocked
 
Reported: 2017-11-07 10:28 UTC by Prasad Pandit
Modified: 2021-10-27 10:53 UTC (History)
36 users (show)

Fixed In Version:
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Last Closed: 2021-10-27 10:53:35 UTC
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Description Prasad Pandit 2017-11-07 10:28:51 UTC 
Linux kernel built with the KVM virtualization(CONFIG_KVM) support
for PowerPC platform(CONFIG_PPC), is vulnerable to a NULL pointer
de-reference issue. It could occur when an unprivileged user attempts
to check if the PPC hardware supports Transactional Memory(KVM_CAP_PPC_HTM).

An unprivileged user could use this flaw to crash the kernel resulting
in DoS scenario.

Upstream patch:
---------------
  -> https://git.kernel.org/linus/ac64115a66c18c01745bbd3c47a36b124e5fd8c0

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/11/06/6
Comment 1 Prasad Pandit 2017-11-07 10:29:54 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1510400]
Comment 4 Prasad Pandit 2017-11-07 10:51:38 UTC 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 6 Justin M. Forbes 2017-11-07 13:12:54 UTC 
This is fixed with the 4.13.11 stable update for Fedora.
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