CVE-2026-47143

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 30, 2026

Advisory Details (4)

Auto-updated Jul 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_pr.
github Patch Available🟡 PoC Available

NULL Pointer Dereference with 3DNow! opcodes · Advisory · capstone-engine/capstone · GitHub

https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
github_pr

Backport of CVE-2026-47143 fix

Fix merged in capstone-engine/capstone PR #2924 on 2026-05-19 — awaiting tagged release

https://github.com/capstone-engine/capstone/pull/2924
github_commit

commit fab595205fee (capstone-engine/capstone)

Fix landed in capstone-engine/capstone commit fab595205fee — awaiting tagged release

https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7
github_commit

commit a0201371719b (capstone-engine/capstone)

Fix landed in capstone-engine/capstone commit a0201371719b — awaiting tagged release

https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f

Vendor Advisories for CVE-2026-47143(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcapstone-main-5.0.8-0.1.hum12026-07-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
capstone4.0.2-3 ... 5.0.9-1 (13 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
capstone4.0.2-5 ... 5.0.9-1 (11 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
capstone5.0.6-1, 5.0.7-1, 5.0.7-1~deb13u1, 5.0.7-2, 5.0.9-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
capstone5.0.6-1, 5.0.7-1, 5.0.7-1~deb13u1, 5.0.7-2, 5.0.9-1——
PyPI(1)
PackageVulnerable rangeFixed inDependents
capstone2.0 ... 5.0.7 (24 versions)5.0.8—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 77× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-08-30 02:12 UTCEG score recompute
  2. 2026-08-30 02:12 UTCVendor advisory
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 11:16 UTCEG score recompute
  7. 2026-08-27 11:16 UTCVendor advisory
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-26 07:15 UTCEG score recompute
  10. 2026-08-26 07:15 UTCVendor advisory
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-25 05:35 UTCEG score recompute
  13. 2026-08-25 05:35 UTCVendor advisory
  14. 2026-08-24 04:11 UTCVendor advisory
  15. 2026-08-23 02:47 UTCEG score recompute
  16. 2026-08-23 02:47 UTCVendor advisory
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 01:22 UTCEG score recompute
  19. 2026-08-22 01:22 UTCVendor advisory
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-20 23:57 UTCEG score recompute
  22. 2026-08-20 23:57 UTCVendor advisory
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-19 22:33 UTCEG score recompute
  25. 2026-08-19 22:33 UTCVendor advisory
Show 75 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-18 19:28 UTCEG score recompute
  3. 2026-08-18 19:28 UTCVendor advisory
  4. 2026-08-18 13:48 UTCEPSS rescore
  5. 2026-08-17 15:34 UTCEG score recompute
  6. 2026-08-17 15:34 UTCVendor advisory
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 14:10 UTCEG score recompute
  10. 2026-08-16 14:10 UTCVendor advisory
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 12:46 UTCEG score recompute
  13. 2026-08-15 12:46 UTCVendor advisory
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 11:15 UTCEG score recompute
  16. 2026-08-14 11:15 UTCVendor advisory
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 09:52 UTCEG score recompute
  19. 2026-08-13 09:52 UTCVendor advisory
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-12 08:28 UTCEG score recompute
  22. 2026-08-12 08:28 UTCVendor advisory
  23. 2026-08-11 07:04 UTCEG score recompute
  24. 2026-08-11 07:04 UTCVendor advisory
  25. 2026-08-11 00:00 UTCEPSS rescore
  26. 2026-08-10 05:40 UTCEG score recompute
  27. 2026-08-10 05:40 UTCVendor advisory
  28. 2026-08-09 13:46 UTCEPSS rescore
  29. 2026-08-09 04:17 UTCEG score recompute
  30. 2026-08-09 04:17 UTCVendor advisory
  31. 2026-08-08 16:37 UTCEPSS rescore
  32. 2026-08-08 02:53 UTCEG score recompute
  33. 2026-08-08 02:53 UTCVendor advisory
  34. 2026-08-07 01:29 UTCEG score recompute
  35. 2026-08-07 01:29 UTCVendor advisory
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-06 00:05 UTCEG score recompute
  38. 2026-08-06 00:05 UTCVendor advisory
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-04 22:41 UTCEG score recompute
  41. 2026-08-04 22:41 UTCVendor advisory
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 10:39 UTCEPSS rescore
  44. 2026-08-03 21:18 UTCVendor advisory
  45. 2026-08-02 19:54 UTCEG score recompute
  46. 2026-08-02 19:54 UTCVendor advisory
  47. 2026-08-02 02:27 UTCEPSS rescore
  48. 2026-08-01 18:30 UTCEG score recompute
  49. 2026-08-01 18:30 UTCVendor advisory
  50. 2026-08-01 04:16 UTCEPSS rescore
  51. 2026-07-31 17:06 UTCEG score recompute
  52. 2026-07-31 17:06 UTCVendor advisory
  53. 2026-07-30 16:28 UTCEPSS rescore
  54. 2026-07-30 15:40 UTCEG score recompute▲ 0.80
  55. 2026-07-30 15:40 UTCVendor advisory
  56. 2026-07-30 15:29 UTCNVD updateCVSS v3 → 5.9
  57. 2026-07-30 10:02 UTCEG score recompute
  58. 2026-07-30 10:02 UTCVendor advisory
  59. 2026-07-30 01:30 UTCEPSS rescore
  60. 2026-07-29 08:38 UTCEG score recompute
  61. 2026-07-29 08:38 UTCVendor advisory
  62. 2026-07-28 15:37 UTCEPSS rescore
  63. 2026-07-28 07:14 UTCEG score recompute
  64. 2026-07-27 14:13 UTCEPSS rescore
  65. 2026-07-27 05:44 UTCEG score recompute
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 04:19 UTCEG score recompute
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-24 14:17 UTCEPSS rescore
  71. 2026-07-23 14:18 UTCEPSS rescore
  72. 2026-07-23 03:17 UTCEG score recompute
  73. 2026-07-22 22:59 UTCEG score recompute
  74. 2026-07-22 14:08 UTCEPSS rescore
  75. 2026-07-21 21:24 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-47143?
CVE-2026-47143 is a medium vulnerability published on July 21, 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 -DCAPSTONEX86REDUCE, allowing a remote attacker to crash any application using the reduced…
When was CVE-2026-47143 disclosed?
CVE-2026-47143 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47143 actively exploited?
CVE-2026-47143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.2% of all scored CVEs.
What is the CVSS score of CVE-2026-47143?
CVE-2026-47143 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-47143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47143, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-47143

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