CVE-2022-39343Public exploit

Memory corruption via overflowing log size check

Published Nov 8, 2022 · Updated Apr 22, 2025

Buffer overflow in Eclipse ThreadX FileX before 6.2.0 allows attackers to modify memory through a crafted fault-tolerant directory log. The _fx_fault_tolerant_apply_logs function adds attacker-controlled copy offsets and lengths in native-width arithmetic, allowing the bounds calculation to wrap before a buffer copy. Exploitation requires the Fault Tolerant feature to accept a log with a valid identifier and checksum; the bounded reported consequence is memory-content modification.

CVSS severity7.8
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Eclipse ThreadX FileX before 6.2.0 allows attackers to modify memory through a crafted fault-tolerant directory log. The _fx_fault_tolerant_apply_logs function adds attacker-controlled copy offsets and lengths in native-width arithmetic, allowing the bounds calculation to wrap before a buffer copy. Exploitation requires the Fault Tolerant feature to accept a log with a valid identifier and checksum; the bounded reported consequence is memory-content modification.

The record

CVE
CVE-2022-39343
Published
Nov 8, 2022
Updated
Apr 22, 2025
Vendor
The Eclipse Foundation
Product
Eclipse ThreadX FileX
Classifications
CWE-191, CWE-190, CWE-120
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse ThreadX FileXversion=< 6.2.0

Published CVSS scores

5.6GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-190Integer Overflow or Wraparound
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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