Bug 1997535 (CVE-2021-28696) - CVE-2021-28696 xen: physical device from a guest allowing to access memory
Summary: CVE-2021-28696 xen: physical device from a guest allowing to access memory
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-28696
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: 1997537
Blocks: 1997570
TreeView+ depends on / blocked
 
Reported: 2021-08-25 13:02 UTC by Dhananjay Arunesh
Modified: 2021-08-26 15:35 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2021-08-26 15:35:49 UTC
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Description Dhananjay Arunesh 2021-08-25 13:02:38 UTC 
on AMD systems, upon de-assigment of a physical device from a
guest, the identity mappings would be left in place, allowing a guest
continued access to ranges of memory which it shouldn't have access to
anymore
Comment 1 Dhananjay Arunesh 2021-08-25 13:03:01 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1997537]
Comment 2 Product Security DevOps Team 2021-08-26 15:35:49 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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