CVE-2021-20221
published 2021-05-13CVE-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…
PriorityP421medium6CVSS 3.1
AVLACLPRHUINSCCNINAH
EPSS
0.32%
24.4th percentile
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 an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | qemu | < qemu 1:5.2+dfsg-4 (bookworm) | qemu 1:5.2+dfsg-4 (bookworm) |
| msrc | cm1_qemu-kvm_4.2.0-33_on_cbl_mariner_1.0 | — | — |
| qemu | qemu | <= 4.2.0 | — |
| qemu | qemu | — | — |
| qemu | qemu | >= 0 < 1:5.2+dfsg-4 | 1:5.2+dfsg-4 |
| qemu | qemu | >= 0 < 1:5.2+dfsg-4 | 1:5.2+dfsg-4 |
| qemu | qemu | >= 0 < 1:5.2+dfsg-4 | 1:5.2+dfsg-4 |
| qemu | qemu | >= 0 < 1:5.2+dfsg-4 | 1:5.2+dfsg-4 |
| qemu | qemu | >= 0 < 1:2.11+dfsg-1ubuntu7.37 | 1:2.11+dfsg-1ubuntu7.37 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.17 | 1:4.2-3ubuntu6.17 |
| redhat | enterprise_linux | — | — |
| ubuntu | qemu | — | — |
CVSS provenance
nvdv3.16.0MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:N/I:N/A:P
osv6.0MEDIUM
vendor_debian6.0MEDIUM
vendor_msrc6.0MEDIUM
vendor_redhat6.0MEDIUM
vendor_ubuntu3.8LOW
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Ubuntu
QEMU regression
vendor_ubuntu·2026-06-28·CVSS 3.8
CVE-2020-11947 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-8412-1 introduced a regression in QEMU
USN-8412-1 fixed vulnerabilities QEMU. On Ubuntu 20.04 LTS, the fix for
CVE-2024-4467 was incomplete and prevented the creation of boot volumes
from qcow2 images. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2026-06-09·CVSS 3.8
CVE-2021-3416 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations, leading to a heap-based buffer over-read. An
attacker could possibly use this issue to expose sensitive information from
the host. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-11947)
Ziming Zhang discovered that the SM501 display driver in QEM
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2021-07-15·CVSS 2.3
CVE-2021-3594 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Lei Sun discovered that QEMU incorrectly handled certain MMIO operations.
An attacker inside the guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2020-15469)
Wenxiang Qian discovered that QEMU incorrectly handled certain ATAPI
commands. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 21.04. (CVE-2020-29443)
Cheolwoo Myung discovered that QEMU incorrectly handled SCSI device
emulation. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. (CVE-2020-35504,
CVE-2020-35505, CVE-2021-3392)
Alex Xu di
Microsoft
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 a
vendor_msrc·2021-05-11·CVSS 6.0
CVE-2021-20221 [MEDIUM] CWE-125 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 a
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 an interrupt ID to the controller memory area it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure ve
Red Hat
qemu: out-of-bound heap buffer access via an interrupt ID field
vendor_redhat·2021-02-02·CVSS 6.0
CVE-2021-20221 [MEDIUM] CWE-125 qemu: out-of-bound heap buffer access via an interrupt ID field
qemu: out-of-bound heap buffer access via an interrupt ID field
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 an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bi
Debian
CVE-2021-20221: qemu - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt...
vendor_debian·2021·CVSS 6.0
CVE-2021-20221 [MEDIUM] CVE-2021-20221: qemu - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt...
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 an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
Scope: local
bookworm: resolved (fixed in 1:5.2+dfsg-4)
bullseye: resolved (fixed in 1:5.2+dfsg-4)
forky: resolved (fixed in 1:5.2+dfsg-4)
sid: resolved (fixed in 1:5.2+dfsg-4)
trixie: resolved (fixed in 1:5.2+dfsg-4)
GHSA
GHSA-3f6w-864h-4prm: 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
ghsa_unreviewed·2022-05-24
CVE-2021-20221 [MEDIUM] CWE-125 GHSA-3f6w-864h-4prm: 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
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 an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
OSV
qemu vulnerabilities
osv·2021-07-15·CVSS 2.3
CVE-2020-15469 [LOW] qemu vulnerabilities
qemu vulnerabilities
Lei Sun discovered that QEMU incorrectly handled certain MMIO operations.
An attacker inside the guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2020-15469)
Wenxiang Qian discovered that QEMU incorrectly handled certain ATAPI
commands. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 21.04. (CVE-2020-29443)
Cheolwoo Myung discovered that QEMU incorrectly handled SCSI device
emulation. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. (CVE-2020-35504,
CVE-2020-35505, CVE-2021-3392)
Alex Xu discovered that QEMU incorrectly handled the virtio-fs shared f
OSV
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
osv·2021-05-13·CVSS 6.0
CVE-2021-20221 [MEDIUM] 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
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 an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://www.openwall.com/lists/oss-security/2021/02/05/1https://bugzilla.redhat.com/show_bug.cgi?id=1924601https://lists.debian.org/debian-lts-announce/2021/02/msg00024.htmlhttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://security.netapp.com/advisory/ntap-20210708-0005/http://www.openwall.com/lists/oss-security/2021/02/05/1https://bugzilla.redhat.com/show_bug.cgi?id=1924601https://lists.debian.org/debian-lts-announce/2021/02/msg00024.htmlhttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://security.netapp.com/advisory/ntap-20210708-0005/
2021-05-13
Published