CVE-2026-47143
Published:July 21, 2026
Updated:August 04, 2026
Capstone is a disassembly framework. Versions prior to 6.0.0-Alpha8 and 5.0.8 have a NULL pointer dereference in "modRMRequired()" and "decode()" when disassembling 3DNow! opcodes ("0F 0F") in builds compiled with "-DCAPSTONE_X86_REDUCE", allowing a remote attacker to crash any application using the reduced X86 Capstone library by supplying a crafted input containing the 4-byte sequence "0F 0F <modrm> <imm8>". Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.
Affected Packages
https://github.com/capstone-engine/capstone.git (GITHUB):
Affected version(s) >=6.0.0-Alpha1 <6.0.0-Alpha8Fix Suggestion:
Update to version 6.0.0-Alpha8https://github.com/capstone-engine/capstone.git (GITHUB):
Affected version(s) >=5.0 <5.0.8Fix Suggestion:
Update to version 5.0.8Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.1
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
NULL Pointer Dereference
EPSS
Base Score:
0.40