# CVE-2017-18207: Python 3.5 and 2 others: The Wave_read._read_fmt_chunk function in Lib/wave.py in Python through 3.6.4 does not ensure a nonzero…

CVE-2017-18207 is fixed in Python 3.6 on 1 platform by Python 3.6 3.6.5 (version 3.6.5), released March 28, 2018. 2 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-18207
- Priority: Routine
- CVSS: 6.5
- EPSS: 0.0132
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 1, 2018
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2017-18207

## Description

The Wave_read._read_fmt_chunk function in Lib/wave.py in Python through 3.6.4 does not ensure a nonzero channel value, which allows attackers to cause a denial of service (divide-by-zero and exception) via a crafted wav format audio file. NOTE: the vendor disputes this issue because Python applications "need to be prepared to handle a wide variety of exceptions.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Python 3.6 | 3.6.5 | [Python 3.6 3.6.5](https://patchblox.com/security/data/fix/windows-app/python.python.3.6-3.6.5.md) | Mar 28, 2018 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Python 2 | no-fix |
| Windows apps | Python 3.5 | no-fix |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo