Bug 1753066 - hw: SHUF instruction implementation flaw
Summary: hw: SHUF instruction implementation flaw
Keywords:
Status: CLOSED ERRATA
Alias: None
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: 1764988 1764989 1764990 1764991 1764992 1764993 1764994 1764996 1764997 1764998 1764999 1765000 1766955 1767757 1771653
Blocks: 1752312
TreeView+ depends on / blocked
 
Reported: 2019-09-18 02:00 UTC by Wade Mealing
Modified: 2021-10-25 22:11 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-10-25 22:11:38 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2019:3845 0 None None None 2019-11-12 21:37:11 UTC
Red Hat Product Errata RHEA-2019:3846 0 None None None 2019-11-12 22:38:12 UTC

Description Wade Mealing 2019-09-18 02:00:34 UTC 
A flaw was found in Intel microprocessors implementation of packed byte shuffle AVX instructions (SHUF*). The defect can be exploited to cause stability problems in the processor. This is mitigated through a microcode update.

This could allow an attacker with a local account to possibly crash the system or the host within a guest on a virtual environment.

A system will need to reload updated microcode to correctly fix this issue.

Additional references:

https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf
Comment 7 Wade Mealing 2019-11-12 08:24:03 UTC 
Acknowledgements:

Red Hat thanks Intel for reporting this issue and collaborating on the mitigations for the same.
Comment 8 Prasad Pandit 2019-11-12 10:04:55 UTC 
Statement:

Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/solutions/2019-microcode-nov
Comment 9 Prasad Pandit 2019-11-12 10:04:57 UTC 
External References:

https://access.redhat.com/solutions/2019-microcode-nov
Comment 10 Prasad Pandit 2019-11-12 10:05:01 UTC 
Mitigation:

As of this time there are no known mitigations. Please install relevant updated packages to address this flaw.
Comment 11 Prasad Pandit 2019-11-12 18:10:42 UTC 
Created microcode_ctl tracking bugs for this issue:

Affects: fedora-all [bug 1771653]
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