CVE-2017-11918

HIGH

ChakraCore and Microsoft Edge - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-11918. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a Chakra JavaScript engine vulnerability (CVE-2017-11918) where escape analysis fails to detect that 'tmp' escapes the scope, leading to stack allocation and potential dereference of uninitialized stack values. The loop triggers JIT optimization, and the final call to 'opt()' may dereference uninitialized pointers.

Description

ChakraCore and Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11886, CVE-2017-11889, CVE-2017-11890, CVE-2017-11893, CVE-2017-11894, CVE-2017-11895, CVE-2017-11901, CVE-2017-11903, CVE-2017-11905, CVE-2017-11905, CVE-2017-11907, CVE-2017-11908, CVE-2017-11909, CVE-2017-11910, CVE-2017-11911, CVE-2017-11912, CVE-2017-11913, CVE-2017-11914, CVE-2017-11916, and CVE-2017-11930.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/43469

This PoC exploits a Chakra JavaScript engine vulnerability (CVE-2017-11918) where escape analysis fails to detect that 'tmp' escapes the scope, leading to stack allocation and potential dereference of uninitialized stack values. The loop triggers JIT optimization, and the final call to 'opt()' may dereference uninitialized pointers.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Racy
Target: Microsoft Chakra JavaScript Engine (Edge, IE)
No auth needed
Prerequisites: Target must be using a vulnerable version of Chakra (e.g., Microsoft Edge or Internet Explorer)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039990
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/43469/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/102089

Scores

CVSS v3 7.5
EPSS 0.7341
EPSS Percentile 98.8%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (3)
microsoft/chakracore < 1.7.5
microsoft/edge
Microsoft Corporation/ChakraCore, Microsoft Edge Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016.
Published Dec 12, 2017
Tracked Since Feb 18, 2026