Bug 1997525 (CVE-2021-28700) - CVE-2021-28700 xen: malicious dom0less guest could drive Xen out of memory and leads to DoS
Summary: CVE-2021-28700 xen: malicious dom0less guest could drive Xen out of memory an...
Alias: CVE-2021-28700
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1997527
Blocks: 1997570
TreeView+ depends on / blocked
Reported: 2021-08-25 12:50 UTC by Dhananjay Arunesh
Modified: 2021-08-26 15:35 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2021-08-26 15:35:41 UTC

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Description Dhananjay Arunesh 2021-08-25 12:50:11 UTC
The dom0less feature allows an administrator to create multiple
unprivileged domains directly from Xen.  Unfortunately, the
memory limit from them is not set. This allow a domain to allocate
memory beyond what an administrator originally configured.

Comment 1 Dhananjay Arunesh 2021-08-25 12:50:49 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1997527]

Comment 2 Product Security DevOps Team 2021-08-26 15:35:41 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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