CVE-2020-25723

LOWNVD 3.23.2—
EchelonGraph scoreMEDIUM confidence

Score 3.2 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 3.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
3.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.2Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
3.2
EG Score
3.2(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity32% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

December 2, 2020

Last Modified

November 21, 2024

References (8)

Vendor Advisories for CVE-2020-25723(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuqemu-utils (1:2.5+dfsg-5ubuntu10.48) @ xenial2026-05-23ubuntu
redhatvirt:rhel-8040020210317013608.9f9e2e7e2021-05-18redhat
redhatvirt:rhel-8020020210203192122.4cda2c842021-03-09redhat
redhatvirt-devel:8.2-8020120210203174743.863bb0db2021-02-23redhat
redhatvirt-devel:8.3-8030120210211160750.711321452021-02-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 106 total refreshes for this CVE.

  1. 2026-07-26 14:51 UTCEPSS rescore
  2. 2026-07-25 14:15 UTCEPSS rescore
  3. 2026-07-25 14:14 UTCEPSS rescore
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  7. 2026-07-23 01:51 UTCEG score recompute
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  25. 2026-07-12 22:37 UTCOSV refresh
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  1. 2026-07-12 05:44 UTCEPSS rescore
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  22. 2026-06-27 03:06 UTCEPSS rescore
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  24. 2026-06-24 14:03 UTCEPSS rescore
  25. 2026-06-24 14:03 UTCEPSS rescore
  26. 2026-06-24 08:20 UTCOSV refresh
  27. 2026-06-23 21:31 UTCEPSS rescore
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  29. 2026-06-22 14:23 UTCEPSS rescore
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  51. 2026-06-07 15:23 UTCEPSS rescore
  52. 2026-06-07 15:23 UTCEPSS rescore
  53. 2026-06-07 11:59 UTCOSV refresh
  54. 2026-06-06 13:45 UTCEPSS rescore
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  73. 2026-05-27 13:39 UTCEPSS rescore
  74. 2026-05-26 13:42 UTCEPSS rescore
  75. 2026-05-26 13:42 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-25723?
CVE-2020-25723 is a low vulnerability published on December 2, 2020. 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…
When was CVE-2020-25723 disclosed?
CVE-2020-25723 was first published in the National Vulnerability Database on December 2, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-25723 actively exploited?
CVE-2020-25723 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.7% of all scored CVEs.
What is the CVSS score of CVE-2020-25723?
CVE-2020-25723 has a CVSS v3 base score of 3.2 (NVD).
How do I remediate CVE-2020-25723?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-25723, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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