Predictable Seed in Pseudo-Random Number Generator (PRNG) in ISC BIND - CVE-2025-40780

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Main Vulnerability Database Vulnerabilities #VU117604

Predictable Seed in Pseudo-Random Number Generator (PRNG) in ISC BIND - CVE-2025-40780

Published: October 23, 2025


Vulnerability identifier: #VU117604
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N]
CVE-ID: CVE-2025-40780
CWE-ID: CWE-337
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to poison DNS cache.

The vulnerability exists due to weakness in the Pseudo Random Number Generator (PRNG). A remote attacker can predict the source port and query ID that BIND will use and perform DNS cache poisoning attacks.


Affected software

ISC BIND
Debian Linux
SUSE Linux Enterprise Server 15 SP4
SUSE Manager Proxy 4.3
SUSE Linux Enterprise Server 15 SP3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Server 4.3
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Client Tools for SLE Micro
SUSE Multi-Linux Manager Client Tools for SLE Micro
SUSE Linux Enterprise Micro
SUSE Enterprise Storage
IBM i
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Anolis OS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Server Applications Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
Fedora
Netezza Appliance
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
bind-utils
libns1604
libisccfg1600-debuginfo
libirs1601-debuginfo
libisc1606-debuginfo
libns1604-debuginfo
libisccfg1600
bind-debugsource
libisccc1600-debuginfo
libbind9-1600-debuginfo
libisc1606
libirs1601
bind-debuginfo
libdns1605-64bit
libisccfg1600-64bit
libbind9-1600-64bit
libisccc1600-64bit
libirs1601-64bit
libisc1606-64bit
libdns1605-debuginfo
bind-utils-debuginfo
libdns1605
libbind9-1600
libisccc1600
python3-bind
libirs-devel
bind-chrootenv
bind-devel
bind-doc
bind
bind9.16 (Red Hat package)
bind9.16
bind9.16-chroot
bind9.16-devel
bind9.16-dnssec-utils
bind9.16-libs
bind9.16-utils
bind9.16-license
python3-bind9.16
bind (Red Hat package) main
bind-pkcs11-utils
bind-license
bind-dnssec-doc
bind-pkcs11-libs
bind-pkcs11-devel
bind-pkcs11
bind-libs
bind-dnssec-utils
bind-chroot
bind9.18 (Red Hat package)
bind9 (Ubuntu package)
bind9 (Debian package)
bind9-next
bind-dyndb-ldap
Cryostat
Red Hat OpenShift Container Platform
OpenShift Virtualization

How to mitigate CVE-2025-40780

Install updates from vendor's website.

ISC BIND - addressed in versions 9.18.41, 9.18.41-S1, 9.20.15, 9.20.15-S1, 9.21.14
Netezza Appliance - update to 1.0.0.1
Cryostat - update to 4.1.0
Red Hat OpenShift Container Platform - addressed in versions 4.12.84, 4.13.63, 4.14.61, 4.15.61, 4.16.55, 4.17.47, 4.18.31, 4.19.22, 4.20.10
OpenShift Virtualization - update to 4.19.17
bind-utils - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
libns1604 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libisccfg1600-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libirs1601-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libisc1606-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libns1604-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libisccfg1600 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
bind-debugsource - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
libisccc1600-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libbind9-1600-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libisc1606 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libirs1601 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
bind-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
libdns1605-64bit - update to 9.16.6-150000.12.85.1
libisccfg1600-64bit - update to 9.16.6-150000.12.85.1
libbind9-1600-64bit - update to 9.16.6-150000.12.85.1
libisccc1600-64bit - update to 9.16.6-150000.12.85.1
libirs1601-64bit - update to 9.16.6-150000.12.85.1
libisc1606-64bit - update to 9.16.6-150000.12.85.1
libdns1605-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
bind-utils-debuginfo - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
libdns1605 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libbind9-1600 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
libisccc1600 - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1
python3-bind - addressed in versions 9.16.6-150000.12.85.1, 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1
libirs-devel - update to 9.16.6-150300.22.53.1
bind-chrootenv - update to 9.16.6-150300.22.53.1
bind-devel - update to 9.16.6-150300.22.53.1
bind-doc - addressed in versions 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
bind - addressed in versions 9.16.6-150300.22.53.1, 9.16.50-150400.5.56.1, 9.16.50-150500.8.32.1, 9.18.33-150600.3.18.1, 9.20.15-150700.3.12.1
bind9.16 (Red Hat package) - addressed in versions 9.16.23-0.7.el8_6.9, 9.16.23-0.14.el8_8.7, 9.16.23-0.22.el8_10.4
bind9.16 - update to 9.16.23-0.22
bind9.16-chroot - update to 9.16.23-0.22
bind9.16-devel - update to 9.16.23-0.22
bind9.16-dnssec-utils - update to 9.16.23-0.22
bind9.16-libs - update to 9.16.23-0.22
bind9.16-utils - update to 9.16.23-0.22
bind9.16-license - update to 9.16.23-0.22
python3-bind9.16 - update to 9.16.23-0.22
bind (Red Hat package) main - addressed in versions 9.16.23-1.el9_0.11, 9.16.23-11.el9_2.9, 9.16.23-18.el9_4.10, 9.18.33-4.el10_0.2, 9.18.33-10.el10_1.2
bind-pkcs11-utils - update to 9.16.23-28
python3-bind - update to 9.16.23-28
bind-license - addressed in versions 9.16.23-28, 9.18.21-5
bind-dnssec-doc - addressed in versions 9.16.23-28, 9.18.21-5
bind-utils - addressed in versions 9.16.23-28, 9.18.21-5
bind-pkcs11-libs - update to 9.16.23-28
bind-pkcs11-devel - update to 9.16.23-28
bind-pkcs11 - update to 9.16.23-28
bind-libs - addressed in versions 9.16.23-28, 9.18.21-5
bind-dnssec-utils - addressed in versions 9.16.23-28, 9.18.21-5
bind-devel - addressed in versions 9.16.23-28, 9.18.21-5
bind-debugsource - addressed in versions 9.16.23-28, 9.18.21-5
bind-debuginfo - addressed in versions 9.16.23-28, 9.18.21-5
bind-chroot - addressed in versions 9.16.23-28, 9.18.21-5
bind - addressed in versions 9.16.23-28, 9.18.21-5
bind9.18 (Red Hat package) - update to 9.18.29-5.el9_7.2
bind9 (Ubuntu package) - addressed in versions 1:9.18.30-0ubuntu0.20.04.2+esm1, 1:9.18.39-0ubuntu0.22.04.2, 1:9.18.39-0ubuntu0.24.04.2, 1:9.20.11-0ubuntu0.2, 1:9.20.11-1ubuntu2.1
bind-chroot - update to 9.18.34-2
bind-libs - update to 9.18.34-2
bind-utils - update to 9.18.34-2
bind-dnssec-doc - update to 9.18.34-2
bind-doc - update to 9.18.34-2
bind-license - update to 9.18.34-2
bind-dnssec-utils - update to 9.18.34-2
bind-devel - update to 9.18.34-2
bind - update to 9.18.34-2
bind - addressed in versions 9.18.41-1.fc41, 9.18.41-1.fc42, 9.18.41-1.fc43, 9.18.41-1.fc44
bind9 (Debian package) - addressed in versions 1:9.18.41-1~deb12u1, 1:9.20.15-1~deb13u1
bind9-next - update to 9.21.14-2.fc43
bind-dyndb-ldap - addressed in versions 11.10-35.fc41, 11.11-7.fc42, 11.11-8.fc43, 11.11-8.fc44

External References

Related Security Bulletins