CVE-2020-25723

QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c

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Severity

Low

Red Hat Product Security

3.2

CVSS 3.1

Review impact separately from score.

Published · August 12, 2020

Updated · June 28, 2026

Description

A reachable assertion vulnerability was found in the USB EHCI emulation code of QEMU. This issue occurs while processing USB requests due to missed handling of DMA memory map failure. This flaw allows a malicious privileged user within the guest to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Statement

Releases of Red Hat OpenStack Platform versions 15 and newer consume fixes directly from the Red Hat Enterprise Linux 8 Advanced Virtualization repository.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.2
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

CWE-617 · Reachable Assertion