Capstone has a NULL Pointer Dereference with 3DNow! opcodes
CVE-2026-47143 is fixed in capstone on 1 platform by DEBIAN-CVE-2026-47143 (version 5.0.9-1), released August 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| capstone · Debian 14 | 5.0.9-1 | DEBIAN-CVE-2026-47143 | Aug 10, 2026 |
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