CVE-2024-5642 Affecting python39-cffi package, versions <0:1.14.3-2.module+el8.9.0+90016+9c2d6573


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.19% (42nd percentile)

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  • Snyk IDSNYK-ORACLE8-PYTHON39CFFI-14577497
  • published24 Dec 2025
  • disclosed27 Jun 2024

Introduced: 27 Jun 2024

CVE-2024-5642  (opens in a new tab)

How to fix?

Upgrade Oracle:8 python39-cffi to version 0:1.14.3-2.module+el8.9.0+90016+9c2d6573 or higher.
This issue was patched in ELSA-2025-23530.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39-cffi package and not the python39-cffi package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).

CVSS Base Scores

version 3.1