Bug 1765043 (CVE-2019-18421) - CVE-2019-18421 xen: a malicious PV guest administrator may be able to escalate their privilege to that of the host
Summary: CVE-2019-18421 xen: a malicious PV guest administrator may be able to escalat...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2019-18421
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1767726
Blocks: 1762982
TreeView+ depends on / blocked
 
Reported: 2019-10-24 08:32 UTC by Marian Rehak
Modified: 2020-05-05 13:08 UTC (History)
24 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in xen. Several race conditions exist that, if triggered, can cause Xen to drop or retain extra type counts allowing guests to get write access to in-use pagetables. The highest threat from this vulnerability is to data confidentiality and integrity as well as to system availability.
Clone Of:
Environment:
Last Closed: 2020-02-24 15:16:04 UTC
Embargoed:

Attachments (Terms of Use)

Description Marian Rehak 2019-10-24 08:32:42 UTC 
The code contains several races which, if triggered, can cause Xen to drop or retain extra type counts, potentially allowing guests to get write access to in-use pagetables.
Comment 3 Marian Rehak 2019-11-01 08:50:07 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1767726]
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