Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Capstone-Engine | Capstone | < 5.0.8 |
Related Weaknesses (CWE)
References
- https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab28988Patch
- https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2Patch
- https://github.com/capstone-engine/capstone/pull/2924Issue TrackingPatch
- https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fExploitVendor Advisory
- https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fExploitVendor Advisory
FAQ
What is CVE-2026-47143?
CVE-2026-47143 is a vulnerability with a CVSS score of 5.1 (MEDIUM). 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 ...
How severe is CVE-2026-47143?
CVE-2026-47143 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47143?
Check the references section above for vendor advisories and patch information. Affected products include: Capstone-Engine Capstone.