CVE-2025-67873 MEDIUM

CVE-2025-67873: Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow

Vendor Capstone-Engine
Product capstone
Weakness CWE-122
Published December 17, 2025
Last update December 18, 2025
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

What the vulnerability does

01Description

Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.

Key dates

02Disclosure timeline

December 17, 2025 CVE published
December 18, 2025 Record updated