What is CVE-2025-67873?

CVE-2025-67873 is a medium-severity vulnerability in Capstone-engine Capstone, classified under Heap-based Buffer Overflow. CVSS score: 4.8/10. Published 2025-12-17.

How severe is CVE-2025-67873?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Buffer overflow in Capstone-engine Capstone

CVE-2025-67873

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…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (9.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.

Affected products

Capstone-engine Capstone — versions 6.0.0, <= 6.0.0-Alpha5

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-67873?: CVE-2025-67873 is a medium-severity vulnerability in Capstone-engine Capstone, classified under Heap-based Buffer Overflow. CVSS score: 4.8/10. Published 2025-12-17.
How severe is CVE-2025-67873?: Medium severity. CVSS v3 base score is 4.8 out of 10.