CVE-2022-2347

HIGHNVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 56% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
7.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.7Exploit: NoneExposed: 0

A fix is available — apply it.

There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a wLength greater than 4096 bytes, they can write beyond the heap-allocated request buffer.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
44.4%
KEV
Not listed

Published

September 23, 2022

Last Modified

May 12, 2026

References (4)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuu-boot-nezha (2022.10-1089-g528ae9bc6c-0ubuntu1.23.04.2) @ lunar2026-05-22ubuntu
ubuntuu-boot-exynos (2022.01+dfsg-2ubuntu2.3) @ jammy2026-05-22ubuntu

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(2)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 15× in last 7d / 51× 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 148 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 14:16 UTCEPSS rescore
  3. 2026-07-23 02:08 UTCEG score recompute
  4. 2026-07-22 22:55 UTCEG score recompute▲ 0.60
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  25. 2026-07-11 12:52 UTCOSV refresh
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  1. 2026-07-11 08:25 UTCEPSS rescore
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  27. 2026-06-22 19:35 UTCOSV refresh
  28. 2026-06-22 14:24 UTCEPSS rescore
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  75. 2026-05-29 13:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-2347?
CVE-2022-2347 is a high vulnerability published on September 23, 2022. There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download…
When was CVE-2022-2347 disclosed?
CVE-2022-2347 was first published in the National Vulnerability Database on September 23, 2022, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-2347 actively exploited?
CVE-2022-2347 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-2347?
CVE-2022-2347 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2022-2347?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-2347, 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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