CVE-2022-23462Public exploit

Process crash via oversized snprintf bound

Published Oct 21, 2022 · Updated Apr 22, 2025

Stack buffer overflow in Softmotions iowow 1.4.15 and earlier allows attackers to crash a consuming process through scientific-notation JSON. The iwjson_ftoa function gives snprintf a 64-byte limit for a 32-byte stack buffer, allowing formatted numeric output to overwrite the stack canary. Reachability depends on a consuming application passing attacker-controlled JSON into the library; the reported consequence is process termination.

CVSS severity6.2
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Softmotions iowow 1.4.15 and earlier allows attackers to crash a consuming process through scientific-notation JSON. The iwjson_ftoa function gives snprintf a 64-byte limit for a 32-byte stack buffer, allowing formatted numeric output to overwrite the stack canary. Reachability depends on a consuming application passing attacker-controlled JSON into the library; the reported consequence is process termination.

The record

CVE
CVE-2022-23462
Published
Oct 21, 2022
Updated
Apr 22, 2025
Vendor
Softmotions
Product
iowow
Classifications
CWE-121, CWE-120, CWE-787, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 21, 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=1.4.15 <=1.4.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Softmotions · iowowversion=1.4.15 <=1.4.15

Published CVSS scores

6.2GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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