Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting bind package, versions <0:9.18.48-1.hum1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.46% (38th percentile)

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  • Snyk IDSNYK-RHEL10-BIND-16065721
  • published19 Apr 2026
  • 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:10 bind to version 0:9.18.48-1.hum1 or higher.
This issue was patched in RHSA-2026:6935.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind package and not the bind package as distributed by RHEL. See How to fix? for RHEL:10 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