Heap-based Buffer Overflow Affecting python3-capstone package, versions <0:4.0.2-9.amzn2023.0.4


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.2% (11th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHON3CAPSTONE-15245366
  • published6 Feb 2026
  • disclosed17 Dec 2025

Introduced: 17 Dec 2025

CVE-2025-67873  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python3-capstone to version 0:4.0.2-9.amzn2023.0.4 or higher.
This issue was patched in ALAS2023-2026-1372.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-capstone package and not the python3-capstone package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1