Infinite loop in QEMU - CVE-2020-25625
Published: September 25, 2020 / Updated: December 31, 2025
Vulnerability identifier: #VU47246
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25625
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
QEMU
QEMU
Software vendor:
QEMU
QEMU
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the USB OHCI controller emulator of QEMU in hw/usb/hcd-ohci.c while servicing OHCI isochronous transfer descriptors (TD) in ohci_service_iso_td routine. A local privileged user can consume all available system resources and cause denial of service conditions.
Remediation
Install update from vendor's website.