In short
- CVE-2026-47143 is a MEDIUM (CVSS 5.9) vulnerability affecting capstone, capstone (capstone-engine).
- Chance of exploitation in the next 30 days (EPSS): 0.47%, higher than 40.5% of all vulnerabilities.
- Fix: update to 5.0.8 or later.
| Package | Affected versions | Patched versions |
|---|
| capstone PyPI | < 5.0.8
| 5.0.8
|
| capstone | = 6.0.0< 5.0.8
| 5.0.8
|
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.
NVD 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.
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