synced 2 MIN AGO
01 Record

CVE-2021-20221

An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.32% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 25.4% of scored records. A rank, not a probability.
NVD base score
6.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-05-13 15:34Z5 YR AGO
Last updated
2024-08-03 17:30Z2 YR AGO
Reserved
2020-12-17
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.1
Document digest
9aba437affb0b42332955d077041576072aa28c89e788b3fe0a085feee22bc3f

05 Affected products

VendorProductVersionsPlatforms
n/aqemuup to, including qemu 4.2.0—

06 References

07 Fixed in

AlmaLinux 8

  • libguestfs-winsupport
    Fixed in 8.2-1.module_el8.5.0+2608+72063365
  • libiscsi
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libnbd
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • libnbd-devel
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • libvirt-dbus
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.3.0-2.module_el8.5.0+2608+72063365
    • Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
  • nbdfuse
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • nbdkit
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-bash-completion
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-basic-filters
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-basic-plugins
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-curl-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-devel
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-example-plugins
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-gzip-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-linuxdisk-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-python-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-server
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-ssh-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-vddk-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-xz-filter
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • netcf
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • perl-Sys-Virt
    Fixed in 6.0.0-1.module_el8.5.0+2608+72063365
  • python3-libnbd
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • python3-libvirt
    Fixed in 6.0.0-1.module_el8.5.0+2608+72063365
  • seabios
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • seabios-bin
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • seavgabios-bin
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • sgabios
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • sgabios-bin
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • supermin
    Fixed in 5.1.19-10.module_el8.5.0+2608+72063365
  • supermin-devel
    Fixed in 5.1.19-10.module_el8.5.0+2608+72063365

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • libguestfs-winsupport
    Fixed in 8.2-1.module_el8.5.0+2608+72063365
  • libiscsi
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.0-8.module_el8.5.0+2608+72063365
    • Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libnbd
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • libnbd-devel
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • libvirt-dbus
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.3.0-2.module_el8.5.0+2608+72063365
    • Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
  • nbdfuse
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • nbdkit
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-bash-completion
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-basic-filters
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-basic-plugins
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-curl-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-devel
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-example-plugins
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-gzip-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-linuxdisk-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-python-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-server
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-ssh-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-vddk-plugin
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • nbdkit-xz-filter
    Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
  • netcf
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • perl-Sys-Virt
    Fixed in 6.0.0-1.module_el8.5.0+2608+72063365
  • python3-libnbd
    Fixed in 1.2.2-1.module_el8.5.0+2608+72063365
  • python3-libvirt
    Fixed in 6.0.0-1.module_el8.5.0+2608+72063365
  • seabios
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • seabios-bin
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • seavgabios-bin
    Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
  • sgabios
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • sgabios-bin
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • supermin
    Fixed in 5.1.19-10.module_el8.5.0+2608+72063365
  • supermin-devel
    Fixed in 5.1.19-10.module_el8.5.0+2608+72063365

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • qemu
    Fixed in 1:5.2+dfsg-4

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • qemu
    Fixed in 1:5.2+dfsg-4

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • qemu
    Fixed in 1:5.2+dfsg-4

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • qemu
    Fixed in 1:2.11+dfsg-1ubuntu7.37

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • qemu
    Fixed in 1:4.2-3ubuntu6.17

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • qemu
    Fixed in 2.0.0+dfsg-2ubuntu1.47+esm6
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • qemu
    Fixed in 1:2.5+dfsg-5ubuntu10.51+esm4
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.