CVE-2018-4382

HIGH

Safari < 12.0.1 - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-4382. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a type confusion vulnerability in JavaScriptCore (CVE-2018-4382) by triggering an out-of-bounds read via a crafted getter. The issue arises when the handler for ArrayPushIntrinsic incorrectly assumes the current instruction is an op_call, leading to memory corruption.

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdosmultiple
https://www.exploit-db.com/exploits/45911

This PoC exploits a type confusion vulnerability in JavaScriptCore (CVE-2018-4382) by triggering an out-of-bounds read via a crafted getter. The issue arises when the handler for ArrayPushIntrinsic incorrectly assumes the current instruction is an op_call, leading to memory corruption.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: WebKit JavaScriptCore (Safari)
No auth needed
Prerequisites: Target must be running a vulnerable version of WebKit
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209195
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209192
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209194
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209197
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209198
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209196

Scores

CVSS v3 8.8
EPSS 0.0583
EPSS Percentile 92.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (6)
apple/icloud < 7.8
apple/iphone_os < 12.1
apple/itunes < 12.9.1
apple/safari < 12.0.1
apple/tvos < 12.1
apple/watchos < 5.1
Published Apr 03, 2019
Tracked Since Feb 18, 2026