CVE-2025-40778

Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache.
This issue affects BIND 9 versions 9.11.0 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, 9.11.3-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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.6 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
iscCNA
8.6 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CISA-ADPADP
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CVEADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
bind9
bullseye
vulnerable
bullseye (security)
1:9.16.50-1~deb11u4
fixed
bookworm
vulnerable
bookworm (security)
1:9.18.41-1~deb12u1
fixed
trixie (security)
1:9.20.15-1~deb13u1
fixed
trixie
1:9.20.15-1~deb13u1
fixed
forky
1:9.20.15-2
fixed
sid
1:9.20.15-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
bind9
questing
Fixed 1:9.20.11-1ubuntu2.1
released
plucky
Fixed 1:9.20.11-0ubuntu0.2
released
noble
Fixed 1:9.18.39-0ubuntu0.24.04.2
released
jammy
Fixed 1:9.18.39-0ubuntu0.22.04.2
released
focal
Fixed 1:9.18.30-0ubuntu0.20.04.2+esm1
released
bionic
needed
xenial
needs-triage
trusty
needs-triage
isc-dhcp
questing
needs-triage
plucky
needs-triage
noble
needs-triage
jammy
not-affected
focal
not-affected
bionic
needs-triage
xenial
not-affected
trusty
not-affected
bind9-libs
questing
dne
plucky
dne
noble
dne
jammy
needs-triage
focal
needs-triage
Common Weakness Enumeration
References
https://kb.isc.org/docs/cve-2025-40778
http://www.openwall.com/lists/oss-security/2025/10/22/1
https://gist.github.com/N3mes1s/f76b4a606308937b0806a5256bc1f918