CVE-2020-25723

low-risk
Published 2020-12-02

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.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.2/10 Low
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Qemu

References (8)

Mailing List http://www.openwall.com/lists/oss-security/2020/12/22/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1898579
Mailing List https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20201218-0004/
Mailing List http://www.openwall.com/lists/oss-security/2020/12/22/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1898579
Mailing List https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20201218-0004/
19
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 7/34 · Low