# CVE-2025-67873: Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a…

Source: https://junglewise.ai/threats/cve-2025-67873-capstone-is-a-disassembly-framework-in-versions-6-0-0-alpha5-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-17  
License: CC BY 4.0 with a link back

CVE-2025-67873 · Severity: medium · CVSS 4.8 · Published 2025-12-17

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.

Technologies: [Capstone Engine Capstone](https://junglewise.ai/threats/technologies/capstone). Vendors: [Capstone Engine](https://junglewise.ai/threats/vendors/capstone-engine).

## Quick answers

**Is CVE-2025-67873 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-67873 being exploited in the wild.

**How severe is CVE-2025-67873?** Medium severity, with a CVSS score of 4.8, published 17 December 2025.

**Which products and versions are affected?** Capstone Engine Capstone. The advisory does not name versions.

**Is there a fix for CVE-2025-67873?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-67873?** Check whether you run Capstone Engine Capstone. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Capstone Engine Capstone

## Related threats

- [Capstone Engine NULL pointer dereference in X86 reduced builds](https://junglewise.ai/threats/cve-2026-47143-capstone-engine-null-pointer-dereference-in-x86-reduced-builds)
- [Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, an unchecked vsnprintf return in…](https://junglewise.ai/threats/cve-2025-68114-capstone-is-a-disassembly-framework-in-versions-6-0-0-alpha5-and)