Bug 1610543 (CVE-2018-15469)

Summary: CVE-2018-15469 xen: Use of v2 grant tables may cause crash on ARM (XSA-268)
Product: [Other] Security Response Reporter: Laura Pardo <lpardo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ailan, drjones, imammedo, jforbes, knoel, m.a.young, mrezanin, pbonzini, rkrcmar, robinlee.sysu, security-response-team, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2018-10-09 11:53:26 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1616081    
Bug Blocks: 1610544    

Description Laura Pardo 2018-07-31 21:33:38 UTC 
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 21:55:19 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1616081]