CVE-2026-47143

MediumCVSS 5.9/10Last modified Oct 24, 2026

Description

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
capstone-enginecapstone< 5.0.8; < 6.0.0-Alpha8

References

Timeline

Published
Jul 21, 2026
Last modified
Oct 24, 2026
NVD status
Analyzed

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CVE-2026-47143: Medium severity, CVSS 5.9 | Vulnix