Bug 1720759 (CVE-2019-17349, CVE-2019-17350)

Summary: CVE-2019-17349 CVE-2019-17350 xen: Unlimited Arm Atomics Operations (XSA-295)
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, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2019-07-12 13:07:49 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1720760    
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Description Laura Pardo 2019-06-14 20:55:31 UTC 
An attacker in a domU could perform a denial of service attack on Xen by accessing a memory region shared with the hypervisor, while Xen is performing an atomic operation on the same region. As a result Xen could end up looping boundlessly. Systems running all versions of Xen are affected. x86 processors are not affected. Arm processors are vulnerable, both Armv7 and Armv8.
Comment 1 Laura Pardo 2019-06-14 20:55:35 UTC 
External References:

https://xenbits.xen.org/xsa/advisory-295.txt
Comment 2 Laura Pardo 2019-06-14 20:55:51 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1720760]