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Bug 1131951 - (CVE-2014-3601) CVE-2014-3601 kernel: kvm: invalid parameter passing in kvm_iommu_map_pages()
CVE-2014-3601 kernel: kvm: invalid parameter passing in kvm_iommu_map_pages()
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=20140819,repor...
: Security
Depends On: 1131952 1131953 1144366
Blocks: 1131958
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Reported: 2014-08-20 07:36 EDT by Petr Matousek
Modified: 2018-08-28 17:55 EDT (History)
17 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A flaw was found in the way the Linux kernel's kvm_iommu_map_pages() function handled IOMMU mapping failures. A privileged user in a guest with an assigned host device could use this flaw to crash the host.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1392 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2014-10-13 21:28:44 EDT

  None (edit)
Description Petr Matousek 2014-08-20 07:36:36 EDT 
A flaw was found in the way iommu mapping failures were handled in
kvm_iommu_map_pages() function in the Linux kernel. A privileged user in the
guest could use this flaw to crash the host in case the guest has access to
passed in device.

Acknowledgements:

Red Hat would like to thank Jack Morgenstein of Mellanox for reporting this issue; the security impact of this issue was discovered by Michael Tsirkin of Red Hat.
Comment 5 Petr Matousek 2014-09-19 05:37:25 EDT 
Statement:

This issue did not affect the Linux kernel versions as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kvm updates for Red Hat Enterprise Linux 5 and Linux kernel updates for Red Hat Enterprise Linux 6 may address this issue.
Comment 6 Martin Prpič 2014-10-10 04:45:19 EDT 
IssueDescription:

A flaw was found in the way the Linux kernel's kvm_iommu_map_pages() function handled IOMMU mapping failures. A privileged user in a guest with an assigned host device could use this flaw to crash the host.
Comment 7 errata-xmlrpc 2014-10-14 02:17:41 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1392 https://rhn.redhat.com/errata/RHSA-2014-1392.html
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