Vulnerability · Published Oct 22, 2025 · Assigned by isc
CVE-2025-8677Resource exhaustion via malformed DNSKEY handling
High 7.5
In plain English
A high-severity security flaw in BIND 9 from ISC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 10.7% (higher than 96% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)10.7%top 4.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 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:9 | bind | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-chroot | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-chroot | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-devel | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-devel | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:9 | bind-dnssec-doc | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-dnssec-utils | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-dnssec-utils | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-doc | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:10 | bind-doc | 32:9.18.33-4.el10_0.2 | ALSA-2025:19912 |
| AlmaLinux:9 | bind-doc | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-libs | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-libs | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| 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:9 | bind-license | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:10 | bind-utils | 32:9.18.33-10.el10_1.2 | ALSA-2025:21034 |
| AlmaLinux:9 | bind-utils | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| AlmaLinux:9 | bind9.18 | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18 | 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-chroot | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-devel | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | bind9.18-devel | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| 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 | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-doc | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| 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 | 32:9.18.29-5.el9_7.2 | ALSA-2025:21111 |
| AlmaLinux:9 | bind9.18-utils | 32:9.18.29-4.el9_6.2 | ALSA-2025:19950 |
| AlmaLinux:9 | python3-bind | 32:9.16.23-40.el9_8.1 | ALSA-2026:18786 |
| Alpine:v3.20 | bind | 9.18.41-r0 | ALPINE-CVE-2025-8677 |
| Alpine:v3.21 | bind | 9.18.41-r0 | ALPINE-CVE-2025-8677 |
| Alpine:v3.22 | bind | 9.20.15-r0 | ALPINE-CVE-2025-8677 |
| Alpine:v3.23 | bind | 9.20.15-r0 | ALPINE-CVE-2025-8677 |
| Alpine:v3.24 | bind | 9.20.15-r0 | ALPINE-CVE-2025-8677 |
| Debian:12 | bind9 | 1:9.18.41-1~deb12u1 | DSA-6033-1 |
| Debian:12 | bind9 | 1:9.18.41-1~deb12u1 | DEBIAN-CVE-2025-8677 |
| Debian:13 | bind9 | 1:9.20.15-1~deb13u1 | DEBIAN-CVE-2025-8677 |
| Debian:13 | bind9 | 1:9.20.15-1~deb13u1 | DSA-6033-1 |
| Debian:14 | bind9 | 1:9.20.15-1 | DEBIAN-CVE-2025-8677 |
| Rocky Linux:10 | bind | 2:9.18.33-10.el10_1.2 | RLSA-2025:21034 |
| Rocky Linux:9 | bind | 2:9.16.23-40.el9_8.1 | RLSA-2026:18786 |
| 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 | UBUNTU-CVE-2025-8677 |
| Ubuntu:22.04:LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.2 | USN-7836-1 |
| Ubuntu:22.04:LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.7 | 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-2025-8677 |
| Ubuntu:24.04:LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.8 | USN-8929-1 |
| 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-2025-8677 |
| 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-2025-8677 |
| Ubuntu:22.04:LTS | bind9-libs | no fix listed | UBUNTU-CVE-2025-8677 |
| Ubuntu:24.04:LTS | isc-dhcp | no fix listed | UBUNTU-CVE-2025-8677 |
| Ubuntu:25.10 | isc-dhcp | no fix listed | UBUNTU-CVE-2025-8677 |
| Ubuntu:26.04:LTS | isc-dhcp | no fix listed | UBUNTU-CVE-2025-8677 |
Affected products (as reported)
Weakness: CWE-405 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H