Vulnerability · Published Oct 22, 2025 · Assigned by isc
CVE-2025-40778Cache poisoning attacks with unsolicited RRs
High 8.6
In plain English
A high-severity security flaw in BIND 9 from ISC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.6High
Exploit odds (30 days)0.7%top 47.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | bind | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:8 | bind | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:10 | bind-chroot | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:8 | bind-chroot | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind-chroot | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:10 | bind-devel | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:8 | bind-devel | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind-devel | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:9 | bind-dnssec-doc | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:10 | bind-dnssec-utils | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-dnssec-utils | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:10 | bind-doc | 32:9.18.33-4.el10_0.2 | ALSA-2025:19912 |
| AlmaLinux:10 | bind-doc | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-doc | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:8 | bind-export-devel | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-export-libs | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:10 | bind-libs | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:8 | bind-libs | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind-libs | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:8 | bind-libs-lite | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:10 | bind-license | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:10 | bind-license | 32:9.18.33-4.el10_0.2 | ALSA-2025:19912 |
| AlmaLinux:8 | bind-license | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind-license | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:8 | bind-lite-devel | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-pkcs11 | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-pkcs11-devel | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-pkcs11-libs | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-pkcs11-utils | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-sdb | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:8 | bind-sdb-chroot | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:10 | bind-utils | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:8 | bind-utils | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | bind-utils | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:8 | bind9.16 | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-chroot | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-devel | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-dnssec-utils | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-doc | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-libs | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-license | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:8 | bind9.16-utils | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| AlmaLinux:9 | bind9.18 | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18 | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-chroot | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-chroot | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-devel | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-devel | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-dnssec-utils | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-dnssec-utils | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-doc | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-doc | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-libs | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-libs | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-utils | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-utils | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:8 | python3-bind | 32:9.11.36-16.el8_10.6 | ALSA-2025:19835 |
| AlmaLinux:9 | python3-bind | 32:9.16.23-34.el9_7.1 | ALSA-2025:21110 |
| AlmaLinux:8 | python3-bind9.16 | 32:9.16.23-0.22.el8_10.4 | ALSA-2025:19793 |
| Alpine:v3.20 | bind | 9.18.41-r0 | ALPINE-CVE-2025-40778 |
| Alpine:v3.21 | bind | 9.18.41-r0 | ALPINE-CVE-2025-40778 |
| Alpine:v3.22 | bind | 9.20.15-r0 | ALPINE-CVE-2025-40778 |
| Alpine:v3.23 | bind | 9.20.15-r0 | ALPINE-CVE-2025-40778 |
| Alpine:v3.24 | bind | 9.20.15-r0 | ALPINE-CVE-2025-40778 |
| Debian:12 | bind9 | 1:9.18.41-1~deb12u1 | DEBIAN-CVE-2025-40778 |
| Debian:12 | bind9 | 1:9.18.41-1~deb12u1 | DSA-6033-1 |
| Debian:13 | bind9 | 1:9.20.15-1~deb13u1 | DSA-6033-1 |
| Debian:13 | bind9 | 1:9.20.15-1~deb13u1 | DEBIAN-CVE-2025-40778 |
| Debian:14 | bind9 | 1:9.20.15-1 | DEBIAN-CVE-2025-40778 |
| Rocky Linux:10 | bind | 2:9.18.33-10.el10_1.2 | RLSA-2025:21034 |
| Rocky Linux:8 | bind | 2:9.11.36-16.el8_10.6 | RLSA-2025:19835 |
| Rocky Linux:9 | bind | 2:9.16.23-34.el9_7.1 | RLSA-2025:21110 |
| Rocky Linux:8 | bind9.16 | 2:9.16.23-0.22.el8_10.4 | RLSA-2025:19793 |
| Rocky Linux:9 | bind9.18 | 2:9.18.29-5.el9_7.2 | RLSA-2025:21111 |
| Ubuntu:22.04:LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.2 | USN-7836-1 |
| Ubuntu:22.04:LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.2 | UBUNTU-CVE-2025-40778 |
| Ubuntu:22.04:LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.7 | USN-8929-1 |
| Ubuntu:24.04:LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.8 | USN-8929-1 |
| Ubuntu:24.04:LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.2 | USN-7836-1 |
| Ubuntu:24.04:LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.2 | UBUNTU-CVE-2025-40778 |
| Ubuntu:25.10 | bind9 | 1:9.20.11-1ubuntu2.1 | USN-7836-1 |
| Ubuntu:25.10 | bind9 | 1:9.20.11-1ubuntu2.1 | UBUNTU-CVE-2025-40778 |
| Ubuntu:26.04:LTS | bind9 | 1:9.20.24-1ubuntu0.4 | USN-8929-1 |
| Ubuntu:26.04:LTS | bind9 | 1:9.20.11-1ubuntu3 | UBUNTU-CVE-2025-40778 |
| Ubuntu:22.04:LTS | bind9-libs | no fix listed | UBUNTU-CVE-2025-40778 |
| Ubuntu:24.04:LTS | isc-dhcp | no fix listed | UBUNTU-CVE-2025-40778 |
| Ubuntu:25.10 | isc-dhcp | no fix listed | UBUNTU-CVE-2025-40778 |
| Ubuntu:26.04:LTS | isc-dhcp | no fix listed | UBUNTU-CVE-2025-40778 |
Affected products (as reported)
Weakness: CWE-349 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N