Bug 1801083 (CVE-2019-19581) - CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
Summary: CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to ca...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-19581
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: 1801084
Blocks: 1801085
TreeView+ depends on / blocked
 
Reported: 2020-02-10 08:39 UTC by Marian Rehak
Modified: 2021-02-16 20:38 UTC (History)
22 users (show)

Fixed In Version:
Doc Type: No Doc Update
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Last Closed: 2020-02-18 15:13:55 UTC
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Description Marian Rehak 2020-02-10 08:39:54 UTC 
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a DoS (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases. 64-bit Arm systems are not vulnerable.

External Reference:

https://xenbits.xen.org/xsa/advisory-307.html
Comment 1 Marian Rehak 2020-02-10 08:40:24 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1801084]
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