CVE-2021-3750

Name
CVE-2021-3750
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.
NVD Severity
high
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://gitlab.com/qemu-project/qemu/-/issues/556
MISC https://bugzilla.redhat.com/show_bug.cgi?id=1999073
MISC https://gitlab.com/qemu-project/qemu/-/issues/541

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* qemu >= None < 7.0.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
qemu 3.15-community 6.1.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable