Bug 1905675 (CVE-2020-29570) - CVE-2020-29570 xen: FIFO event channels control block related ordering (XSA-358)
Summary: CVE-2020-29570 xen: FIFO event channels control block related ordering (XSA-358)
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-29570
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: 1907931
Blocks: 1903644
TreeView+ depends on / blocked
 
Reported: 2020-12-08 19:40 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 18:46 UTC (History)
4 users (show)

Fixed In Version:
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Last Closed: 2020-12-15 22:20:12 UTC
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Description Guilherme de Almeida Suckevicz 2020-12-08 19:40:54 UTC 
Recording of the per-vCPU control block mapping maintained by Xen and
that of pointers into the control block is reversed.  The consumer
assumes, seeing the former initialized, that the latter are also ready
for use.
Comment 1 Guilherme de Almeida Suckevicz 2020-12-15 14:31:38 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1907931]
Comment 2 Guilherme de Almeida Suckevicz 2020-12-15 16:25:41 UTC 
External References:

https://www.openwall.com/lists/oss-security/2020/12/15/14
Comment 3 Product Security DevOps Team 2020-12-15 22:20:12 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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