CVE - CVE-2021-28698

CVE-ID
CVE-2021-28698	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
long running loops in grant table handling In order to properly monitor resource use, Xen maintains information on the grant mappings a domain may create to map grants offered by other domains. In the process of carrying out certain actions, Xen would iterate over all such entries, including ones which aren't in use anymore and some which may have been created but never used. If the number of entries for a given domain is large enough, this iterating of the entire table may tie up a CPU for too long, starving other domains or causing issues in the hypervisor itself. Note that a domain may map its own grants, i.e. there is no need for multiple domains to be involved here. A pair of "cooperating" guests may, however, cause the effects to be more severe.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
DEBIAN:DSA-4977 URL:https://www.debian.org/security/2021/dsa-4977 FEDORA:FEDORA-2021-081f9bf5d2 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/ FEDORA:FEDORA-2021-4f129cc0c1 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/ FEDORA:FEDORA-2021-d68ed12e46 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/ GENTOO:GLSA-202208-23 URL:https://security.gentoo.org/glsa/202208-23 MISC:https://xenbits.xenproject.org/xsa/advisory-380.txt URL:https://xenbits.xenproject.org/xsa/advisory-380.txt MLIST:[oss-security] 20210901 Xen Security Advisory 380 v3 (CVE-2021-28698) - long running loops in grant table handling URL:http://www.openwall.com/lists/oss-security/2021/09/01/2
Assigning CNA
Xen Project
Date Record Created
20210318	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210318)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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