CVE-2021-3750
A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted
02 Description
A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted
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
- 0.51% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 43.4% of scored records. A rank, not a probability.
- NVD base score
- 8.2 (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:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. 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
- 2022-05-02 18:48Z4 YR AGO
- Last updated
- 2024-08-03 17:09Z2 YR AGO
- Reserved
- 2021-08-30
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- 89ae97a8ac626e459cb657d029ac7c9b79dbb83bc814db1543680e704a1ba941
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1999073
- gitlab.comhttps://gitlab.com/qemu-project/qemu/-/issues/541
- gitlab.comhttps://gitlab.com/qemu-project/qemu/-/issues/556
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20220624-0003/
- security.gentoo.orgGLSA-202208-27https://security.gentoo.org/glsa/202208-27
07 Fixed in
AlmaLinux 8
- SLOF Fixed in 20210217-1.module_el8.6.0+2880+7d9e3703
- hivex Fixed
A version is affected if any line below covers it.
- Affected before 1.3.18-23.module_el8.6.0+2880+7d9e3703
- Affected before 1.3.18-23.module_el8.6.0+3161+a07c0ea5
- hivex-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.3.18-23.module_el8.6.0+2880+7d9e3703
- Affected before 1.3.18-23.module_el8.6.0+3161+a07c0ea5
- libguestfs Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-appliance Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-bash-completion Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gfs2 Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gobject Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gobject-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-inspect-icons Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-java Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-java-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-javadoc Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-man-pages-ja Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-man-pages-uk Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-rescue Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-rsync Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-tools Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-tools-c Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-winsupport Fixed in 8.9-1.module_el8.9.0+3662+ef5fc290.alma.1
- libguestfs-xfs Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.6.0-5.module_el8.6.0+2880+7d9e3703
- Affected before 1.6.0-5.module_el8.6.0+3161+a07c0ea5
- libnbd-bash-completion Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.6.0-5.module_el8.6.0+2880+7d9e3703
- Affected before 1.6.0-5.module_el8.6.0+3161+a07c0ea5
- libtpms Fixed in 0.9.1-2.20211126git1ff6fe1f43.module_el8.9.0+3659+9c8643f3
- libtpms-devel Fixed in 0.9.1-2.20211126git1ff6fe1f43.module_el8.9.0+3659+9c8643f3
- libvirt Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-client Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-config-network Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-config-nwfilter Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-interface Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-network Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-nodedev Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-nwfilter Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-qemu Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
90 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- qemu-guest-agent Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-img Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-audio-pa Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-blkio Fixed in 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-curl Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-rbd Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-common Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-core Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-ccw Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-display-virtio-gpu-pci Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-pci-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-display-virtio-vga Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-vga-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-usb-host Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-usb-redirect Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-docs Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-tools Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-ui-egl-headless Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-ui-opengl Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-pr-helper Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- SLOF Fixed in 20210217-1.module_el8.6.0+2880+7d9e3703
- hivex Fixed
A version is affected if any line below covers it.
- Affected before 1.3.18-23.module_el8.6.0+2880+7d9e3703
- Affected before 1.3.18-23.module_el8.6.0+3161+a07c0ea5
- hivex-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.3.18-23.module_el8.6.0+2880+7d9e3703
- Affected before 1.3.18-23.module_el8.6.0+3161+a07c0ea5
- libguestfs Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-appliance Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-bash-completion Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gfs2 Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gobject Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-gobject-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-inspect-icons Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-java Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-java-devel Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-javadoc Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-man-pages-ja Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-man-pages-uk Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-rescue Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-rsync Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-tools Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-tools-c Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libguestfs-winsupport Fixed in 8.9-1.module_el8.9.0+3662+ef5fc290.alma.1
- libguestfs-xfs Fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- Affected before 1.18.0-8.module_el8.6.0+3161+a07c0ea5
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.6.0-5.module_el8.6.0+2880+7d9e3703
- Affected before 1.6.0-5.module_el8.6.0+3161+a07c0ea5
- libnbd-bash-completion Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.6.0-5.module_el8.6.0+2880+7d9e3703
- Affected before 1.6.0-5.module_el8.6.0+3161+a07c0ea5
- libtpms Fixed in 0.9.1-2.20211126git1ff6fe1f43.module_el8.9.0+3659+9c8643f3
- libtpms-devel Fixed in 0.9.1-2.20211126git1ff6fe1f43.module_el8.9.0+3659+9c8643f3
- libvirt Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-client Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-config-network Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-config-nwfilter Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-interface Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-network Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-nodedev Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-nwfilter Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
- libvirt-daemon-driver-qemu Fixed in 8.0.0-22.module_el8.9.0+3662+ef5fc290
90 further packages in CloudLinux 8 not shown (first 40 listed).
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.
CloudLinux 9
- qemu-guest-agent Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-img Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-audio-pa Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-blkio Fixed in 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-curl Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-block-rbd Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-common Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-core Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-ccw Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-display-virtio-gpu-pci Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-gpu-pci-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-display-virtio-vga Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-display-virtio-vga-gl Fixed in 17:7.0.0-13.el9
- qemu-kvm-device-usb-host Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-device-usb-redirect Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-docs Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-tools Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-ui-egl-headless Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-kvm-ui-opengl Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
- qemu-pr-helper Fixed
A version is affected if any line below covers it.
- Affected before 17:7.0.0-13.el9
- Affected before 17:8.0.0-16.el9_3.alma.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 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 1:7.0+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- qemu Fixed in 1:7.0+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- qemu Fixed in 1:7.0+dfsg-1
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-1ubuntu7.41
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 1:4.2-3ubuntu6.24
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- qemu Fixed in 1:6.2+dfsg-2ubuntu6.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
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