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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2022-05-02T18:48:12

Updated: 2024-08-03T17:09:08.277Z

Reserved: 2021-08-30T00:00:00

Link: CVE-2021-3750

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-05-02T19:15:08.343

Modified: 2023-02-12T23:42:46.640

Link: CVE-2021-3750

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-08-26T00:00:00Z

Links: CVE-2021-3750 - Bugzilla