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›vulnerability›CVE-2021-3750
Name
CVE-2021-3750
Source
NVD ( link)Debian ( link)
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 content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.
CWEs
CWE-416 CWE-416
Published Date
Updated Date
Workaround
-
Advisories
https://bugzilla.redhat.com/show_bug.cgi?id=1999073Issue Tracking
https://gitlab.com/qemu-project/qemu/-/issues/541Exploit
https://gitlab.com/qemu-project/qemu/-/issues/556Third Party Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220624-0003/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1999073Issue Tracking
https://gitlab.com/qemu-project/qemu/-/issues/541Exploit
https://gitlab.com/qemu-project/qemu/-/issues/556Third Party Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220624-0003/Third Party Advisory

Analysis#

Affected Component
Analysis
qemu
Patched

Vulnerability Ratings#

8.2
CVSSv31
4.6
CVSSv2

Others affected components#

Name
Project
Project Version
Version
Status
qemu
buildroot
2025.02.x
9.2.0
Not Affected
qemu
buildroot
master
11.0.0
Not Affected
qemu
openwrt
master
10.1.3-r2
Not Affected
qemu
openwrt
openwrt-25.12
10.1.2-r1
Not Affected
qemu
yocto
master
11.0.1
Not Affected
qemu
yocto
scarthgap
8.2.7
Not Affected

Resolved with patches#

qemu (yocto:kirkstone)

#
Title
Author
Resolve
1
softmmu/physmem: Simplify flatview_write and
=?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
CVE-2021-3750
2
hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR
=?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
CVE-2021-3750
3
softmmu/physmem: Introduce MemTxAttrs::memory field and
=?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
CVE-2021-3750