CVE-2026-47143

MEDIUM5.1

Capstone has a NULL Pointer Dereference with 3DNow! opcodes

Published Jul 21, 2026

Modified 1 months ago

Details

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.

References

WEB

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

WEB

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

WEB

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

WEB

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-47143

CVSS Analysis