CVE-2021-28701: Xen xen

xen: Another race in XENMAPSPACE_grant_table handling Guests are permitted access to certain…

No CVSS scoreEPSS 0.0027 · 18th percentile

Published by the CVE Program (CNA: XEN) at 8 Sept 2021, 13:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Xen	xen	unknown unspecified to before 4.12 custom affected 4.15.x to before unspecified custom unaffected next of xen-unstable to before unspecified custom
Xen	xen	affected 4.11.x
Xen	xen	unknown unspecified to before 4.12 custom affected 4.12.x to before unspecified custom unaffected next of 4.14.x to before unspecified custom

Identifiers

CVE-2021-28701

CNA

XEN

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0027, the 18th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 8 Sept 2021. New records show when each source confirmed them.

Sources

References from the CNA

xenbits.xenproject.org/xsa/advisory-384.txt
xenbits.xen.org/xsa/advisory-384.html confirm
www.openwall.com/lists/oss-security/2021/09/08/2 mailing-listmlist
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L4MI3MQAPGILCLXBGQWPZHGE3ALSO4ZU/ vendor-advisoryfedora
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEHZLIR5DFYYQBH55AERWHLO54OFU42C/ vendor-advisoryfedora
www.debian.org/security/2021/dsa-4977 vendor-advisorydebian
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HEHUIUWSSMCQGQY3GWX4J2SZGYP5W2Z/ vendor-advisoryfedora
security.gentoo.org/glsa/202208-23 vendor-advisorygentoo

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.