CVE-2020-25723

3.2 lowEPSS 0.4%

Low (3.2). EPSS 0.4% chance of exploitation in the next 30 days.

A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service.

Severity

CVSS 3.1

3.2 low

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
CWE: CWE-617
Published: 2020-12-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

debian:debian_linux
qemu:qemu

References

http://www.openwall.com/lists/oss-security/2020/12/22/1
https://bugzilla.redhat.com/show_bug.cgi?id=1898579
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://security.netapp.com/advisory/ntap-20201218-0004/
http://www.openwall.com/lists/oss-security/2020/12/22/1

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