CVE-2021-28709

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Summary

CVECVE-2021-28709
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-11-24 02:15:00 UTC
Updated2024-02-04 08:15:00 UTC
Descriptionissues with partially successful P2M updates on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] x86 HVM and PVH guests may be started in populate-on-demand (PoD) mode, to provide a way for them to later easily have more memory assigned. Guests are permitted to control certain P2M aspects of individual pages via hypercalls. These hypercalls may act on ranges of pages specified via page orders (resulting in a power-of-2 number of pages). In some cases the hypervisor carries out the requests by splitting them into smaller chunks. Error handling in certain PoD cases has been insufficient in that in particular partial success of some operations was not properly accounted for. There are two code paths affected - page removal (CVE-2021-28705) and insertion of new pages (CVE-2021-28709). (We provide one patch which combines the fix to both issues.)

Risk And Classification

Problem Types: CWE-755

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 11.0 All All All
Operating System Fedoraproject Fedora 34 All All All
Operating System Fedoraproject Fedora 35 All All All
Operating System Xen Xen 4.15.0 All All All
Operating System Xen Xen 4.15.1 All All All
Operating System Xen Xen All All All All
Operating System Xen Xen All All All All
Operating System Xen Xen All All All All

References

ReferenceSourceLinkTags
Xen: Multiple Vulnerabilities (GLSA 202402-07) — Gentoo security security.gentoo.org
xenbits.xenproject.org/xsa/advisory-389.txt MISC xenbits.xenproject.org
[SECURITY] Fedora 35 Update: xen-4.15.1-4.fc35 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[SECURITY] Fedora 35 Update: xen-4.15.1-4.fc35 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 34 Update: xen-4.14.3-3.fc34 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
Debian -- Security Information -- DSA-5017-1 xen DEBIAN www.debian.org
[SECURITY] Fedora 34 Update: xen-4.14.3-3.fc34 - 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

  • 178928 Debian Security Update for xen (DSA 5017-1)
  • 182573 Debian Security Update for xen (CVE-2021-28709)
  • 282100 Fedora Security Update for xen (FEDORA-2021-2b3a2de94f)
  • 282136 Fedora Security Update for xen (FEDORA-2021-03645e9807)
  • 390253 Oracle Managed Virtualization (VM) Server for x86 Security Update for xen (OVMSA-2022-0004)
  • 390255 Oracle Managed Virtualization (VM) Server for x86 Security Update for xen (OVMSA-2022-0003)
  • 501522 Alpine Linux Security Update for xen
  • 501800 Alpine Linux Security Update for xen
  • 504547 Alpine Linux Security Update for xen
  • 710858 Gentoo Linux Xen Multiple Vulnerabilities (GLSA 202402-07)
  • 751411 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:3852-1)
  • 751414 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:3851-1)
  • 751417 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:3842-1)
  • 751422 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:3849-1)
  • 751454 OpenSUSE Security Update for xen (openSUSE-SU-2021:1543-1)
  • 751474 OpenSUSE Security Update for xen (openSUSE-SU-2021:3968-1)
  • 751477 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:3977-1)
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