Bug 1610543 – CVE-2018-15469 xen: Use of v2 grant tables may cause crash on ARM (XSA-268)

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Bug 1610543 - (CVE-2018-15469) CVE-2018-15469 xen: Use of v2 grant tables may cause crash on ARM (XSA-268)

Summary:	CVE-2018-15469 xen: Use of v2 grant tables may cause crash on ARM (XSA-268)

Status:	CLOSED NOTABUG

Aliases:	CVE-2018-15469

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20180814:1700,...
Keywords:	Security

Depends On:	1616081
Blocks:	1610544
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Reported:	2018-07-31 17:33 EDT by Laura Pardo
Modified:	2018-10-09 07:53 EDT (History)
CC List:	13 users (show)

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Last Closed:	2018-10-09 07:53:26 EDT
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Description Laura Pardo 2018-07-31 17:33:38 EDT

A flaw was found in xen. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables;  they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service.

Comment 1 Laura Pardo 2018-08-14 17:55:19 EDT

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1616081]

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