Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting bind-doc package, versions <32:9.16.23-18.el9_4.10


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-RHEL9-BINDDOC-14089671
  • published21 Nov 2025
  • disclosed22 Oct 2025

Introduced: 22 Oct 2025

CVE-2025-40780  (opens in a new tab)
CWE-338  (opens in a new tab)

How to fix?

Upgrade RHEL:9 bind-doc to version 32:9.16.23-18.el9_4.10 or higher.
This issue was patched in RHSA-2025:21817.

NVD Description

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

In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use. This issue affects BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

CVSS Base Scores

version 3.1