Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting rhcos package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-RHEL9-RHCOS-16759110
  • published19 May 2026
  • disclosed8 May 2026

Introduced: 8 May 2026

NewCVE-2026-6659  (opens in a new tab)
CWE-338  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:9 rhcos.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rhcos package and not the rhcos package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts.

The built-in rand function is predictable, and unsuitable for cryptography.

CVSS Base Scores

version 3.1