Bug 1720759 (CVE-2019-17349, CVE-2019-17350) - CVE-2019-17349 CVE-2019-17350 xen: Unlimited Arm Atomics Operations (XSA-295)
Summary: CVE-2019-17349 CVE-2019-17350 xen: Unlimited Arm Atomics Operations (XSA-295)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-17349, CVE-2019-17350
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: 1720760
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-06-14 20:55 UTC by Laura Pardo
Modified: 2021-02-16 21:49 UTC (History)
12 users (show)

Fixed In Version:
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Last Closed: 2019-07-12 13:07:49 UTC
Embargoed:

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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]
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