CVE-2026-47143 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-47143MEDIUM

capstone-engine capstone — Capstone has a NULL Pointer Dereference with 3DNow! opcodes

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  N  N  H    5.9   .0040   33.2     —

AFFECTED
  Product   Versions   Fixed
  capstone  < 5.0.8 –  —

TIMELINE
  May 18  Reserved by GitHub_M
  Jul 21  EXPLOIT PUBLISHED — CVE-2026-47143 (capstone-engine capstone). Public exploit reference added.
  Jul 21  Published (CNA: GitHub_M)
  Jul 30  EXPLOIT PUBLISHED — CVE-2026-47143 (capstone-engine capstone). Public exploit reference added.

CWE-476 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
May 18, 2026	Reserved	Reserved by GitHub_M
July 21, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-47143 (capstone-engine capstone). Public exploit reference added.
July 21, 2026	Published	Published (CNA: GitHub_M)
July 30, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-47143 (capstone-engine capstone). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
capstone-engine	capstone	—	< 5.0.8	—

Weaknesses

CWE-476

References (4)

https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f [Patch]
https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7 [Patch]
https://github.com/capstone-engine/capstone/pull/2924 [Issue Tracking, Patch]
https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-47143 at cve.org

Vendors: capstone-engine

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-47143 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.