Vulnerability in capstone (CVE-2026-47143)
Summary
Vulnerability in capstone (CVE-2026-47143). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 5.0.8 or later.
Original description
The description as published by the source.
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 . Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-47143 has been found in capstone.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: upgrade capstone to 5.0.8 or later.
If unsure, ask your IT team or search "capstone CVE-2026-47143" on the vendor's site.
CVE-2026-47143 (capstone) — CWE-476 / CVSS v3 5.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 5.0.8 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-476) exists in capstone.
Check the vendor advisory for the affected versions of capstone.
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure.
Update to 5.0.8.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'capstone' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'capstone' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
capstoneを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade capstone to 5.0.8ステージング環境で 5.0.8 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-47143 capstone Fixed in: 5.0.8-r0
- Ubuntu UBUNTU-CVE-2026-47143 capstone
References
- patch github.com
- patch github.com
- patch github.com
- report github.com