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Bug 1510399 - (CVE-2017-15306) CVE-2017-15306 Kernel: KVM: oops when checking KVM_CAP_PPC_HTM on PPC platform
CVE-2017-15306 Kernel: KVM: oops when checking KVM_CAP_PPC_HTM on PPC platform
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20171106,repor...
: Security
Depends On: 1510400 1510403 1510404
Blocks: 1510302
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Reported: 2017-11-07 05:28 EST by Prasad J Pandit
Modified: 2018-08-28 18:24 EDT (History)
41 users (show)

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Description Prasad J Pandit 2017-11-07 05:28:51 EST 
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:
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  -> https://git.kernel.org/linus/ac64115a66c18c01745bbd3c47a36b124e5fd8c0

Reference:
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  -> http://www.openwall.com/lists/oss-security/2017/11/06/6
Comment 1 Prasad J Pandit 2017-11-07 05:29:54 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1510400]
Comment 4 Prasad J Pandit 2017-11-07 05:51:38 EST 
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 08:12:54 EST 
This is fixed with the 4.13.11 stable update for Fedora.
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