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CVE-2025-40780

Cache poisoning due to weak PRNG

Published: Oct 22, 2025Updated: Nov 4, 2025 Sources: CVE List NVD BDUCWE-341
8.6HIGH
NVD MITRE
EPSS Score
0.4%
Top 67.4%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-341

Affected Products

РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
BINDInternet Systems Consortium
On-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
ооо «ред софт»commercialRUOperating Systemsaka red soft
canonical ltd.commercialGBOperating Systemsaka canonical
ао «ивк»commercialRUOperating Systemsaka ivk
internet systems consortiumoss-projectUSNetworking Infrastructureaka isc
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
and 4 more affected products View all →

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

References

https://ubuntu.com/security/CVE-2025-40780
ubuntu.com
https://dbugs.ptsecurity.com/vulnerability/PT-2025-43373
dbugs.ptsecurity.com
https://kb.isc.org/docs/cve-2025-40780
kb.isc.org
and 7 more references View all →

Timeline

Published
Oct 22, 2025
Last Updated
Nov 4, 2025

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