CVE-2021-28698

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Summary

CVECVE-2021-28698
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-27 19:15:00 UTC
Updated2023-11-07 03:32:00 UTC
Descriptionlong 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.

Risk And Classification

Problem Types: CWE-835

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 11.0 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 34 All All All
Operating System Fedoraproject Fedora 35 All All All
Operating System Xen Xen All All All All

References

ReferenceSourceLinkTags
[SECURITY] Fedora 33 Update: xen-4.14.2-3.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
oss-security - Xen Security Advisory 380 v3 (CVE-2021-28698) - long running loops in grant table handling MLIST www.openwall.com
xenbits.xenproject.org/xsa/advisory-380.txt MISC xenbits.xenproject.org
[SECURITY] Fedora 33 Update: xen-4.14.2-3.fc33 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
FEDORA-2021-081f9bf5d2 FEDORA lists.fedoraproject.org
Xen: Multiple Vulnerabilities (GLSA 202208-23) — Gentoo security GENTOO security.gentoo.org
Debian -- Security Information -- DSA-4977-1 xen DEBIAN www.debian.org
[SECURITY] Fedora 34 Update: xen-4.14.2-3.fc34 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[SECURITY] Fedora 34 Update: xen-4.14.2-3.fc34 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 35 Update: xen-4.15.0-6.fc35 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

LEGACY: Array

Legacy QID Mappings

  • 178798 Debian Security Update for xen (DSA 4977-1)
  • 183124 Debian Security Update for xen (CVE-2021-28698)
  • 281879 Fedora Security Update for xen (FEDORA-2021-4f129cc0c1)
  • 281880 Fedora Security Update for xen (FEDORA-2021-d68ed12e46)
  • 379051 Citrix XenServer Security Updates (CTX325319)
  • 390249 Oracle Managed Virtualization (VM) Server for x86 Security Update for xen (OVMSA-2021-0033)
  • 500801 Alpine Linux Security Update for xen
  • 501519 Alpine Linux Security Update for xen
  • 501797 Alpine Linux Security Update for xen
  • 504544 Alpine Linux Security Update for xen
  • 710600 Gentoo Linux Xen Multiple Vulnerabilities (GLSA 202208-23)
  • 751074 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2925-1)
  • 751083 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2924-1)
  • 751085 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2943-1)
  • 751087 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2955-1)
  • 751100 OpenSUSE Security Update for xen (openSUSE-SU-2021:2923-1)
  • 751103 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2957-1)
  • 751111 OpenSUSE Security Update for xen (openSUSE-SU-2021:1236-1)
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