VDB
CVE-2026-47143
CVE-2026-47143
PUBLISHED
CVSS 5.1 MEDIUM
Reported by GitHub_M · Published 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 `-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.
Risk Scores
CVSS 3.1
5.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| capstone-engine | capstone | < 5.0.8, < 6.0.0-Alpha8 |
| alpine | capstone | 0 |
| capstone-engine | capstone | < 5.0.8, < 6.0.0-Alpha8 |
Timeline
- Jul 21, 2026 CVE Published
- Jul 22, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
- Aug 25, 2026 Security Advisory
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 6, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
References
- https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm x_refsource_CONFIRM
- https://github.com/capstone-engine/capstone/pull/2924 x_refsource_MISC
- https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f x_refsource_MISC
- https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7 x_refsource_MISC