CVE-2024-24189Public exploit

Interpreter crash via freed-memory write

Published Feb 7, 2024 · Updated Jun 20, 2025

Use-after-free in SplitChar in Jsish 3.5.0 allows attackers to crash the interpreter by executing a crafted JavaScript split operation. SplitChar writes eight bytes through a pointer to memory already freed by Jsi_ObjFree while processing an oversized repeated string. The published proof of concept requires execution of attacker-controlled JavaScript and demonstrates an AddressSanitizer abort; code execution is not demonstrated.

CVSS severity9.8
Critical
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

Use-after-free in SplitChar in Jsish 3.5.0 allows attackers to crash the interpreter by executing a crafted JavaScript split operation. SplitChar writes eight bytes through a pointer to memory already freed by Jsi_ObjFree while processing an oversized repeated string. The published proof of concept requires execution of attacker-controlled JavaScript and demonstrates an AddressSanitizer abort; code execution is not demonstrated.

The record

CVE
CVE-2024-24189
Published
Feb 7, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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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-416Use After Free

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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