CVE-2022-39293

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 53% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Azure RTOS USBX is a high-performance USB host, device, and on-the-go (OTG) embedded stack, that is fully integrated with Azure RTOS ThreadX. The case is, in _ux_host_class_pima_read, there is data length from device response, returned in the very first packet, and read by L165 code, as header_length. Then in L178 code, there is a “if” branch, which check the expression of “(header_length - UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE) > data_length” where if header_length is smaller than UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE, calculation could overflow and then L182 code the calculation of data_length is also overflow, this way the later while loop start from L192 can move data_pointer to unexpected address and cause write buffer overflow. The fix has been included in USBX release 6.1.12. The following can be used as a workaround: Add check of header_length: 1. It must be greater than UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE. 1. It should be greater or equal to the current returned data length (transfer_request -> ux_transfer_request_actual_length).

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
47.0%
KEV
Not listed

Published

October 13, 2022

Last Modified

October 27, 2025

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× 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 109 total refreshes for this CVE.

  1. 2026-07-23 02:13 UTCEG score recompute
  2. 2026-07-22 23:00 UTCEG score recompute
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Frequently asked(5)

What is CVE-2022-39293?
CVE-2022-39293 is a high vulnerability published on October 13, 2022. Azure RTOS USBX is a high-performance USB host, device, and on-the-go (OTG) embedded stack, that is fully integrated with Azure RTOS ThreadX. The case is, in uxhostclasspimaread, there is data length from device response, returned in the very first packet, and read by L165 code, as headerlength.…
When was CVE-2022-39293 disclosed?
CVE-2022-39293 was first published in the National Vulnerability Database on October 13, 2022, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-39293 actively exploited?
CVE-2022-39293 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-39293?
CVE-2022-39293 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2022-39293?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-39293, 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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