CVE-2018-8298

HIGH KEV

ChakraCore < 1.10.1 - Remote Code Execution via Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2018-8298 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added March 3, 2022. EIP tracks 1 public exploit from researchers including Google Security Research.

AI-analyzed exploit summary This PoC exploits a type confusion vulnerability in Microsoft Edge's Intl.js by reinitializing the same object multiple times, leading to potential memory corruption. The issue arises due to missing initialization checks in the ICU versions of InitializeNumberFormat and InitializeDateTimeFormat.

Description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8242, CVE-2018-8283, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/45217

This PoC exploits a type confusion vulnerability in Microsoft Edge's Intl.js by reinitializing the same object multiple times, leading to potential memory corruption. The issue arises due to missing initialization checks in the ICU versions of InitializeNumberFormat and InitializeDateTimeFormat.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Edge 42.17672.1000.0 and Microsoft EdgeHTML 17.17672
No auth needed
Prerequisites: Access to a vulnerable version of Microsoft Edge
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104639
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45217/

Scores

CVSS v3 7.5
EPSS 0.8937
EPSS Percentile 99.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2022-03-03
VulnCheck KEV 2022-03-03
InTheWild.io 2022-03-03
ENISA EUVD EUVD-2022-5575
CWE
CWE-843
Status published
Products (2)
microsoft/chakracore < 1.10.1
nuget/Microsoft.ChakraCore 0 - 1.10.1NuGet
Published Jul 11, 2018
KEV Added Mar 03, 2022
Tracked Since Feb 18, 2026