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Fencer Vulns
high 7.5

CVE-2025-8677 in the critical feed json

Resource exhaustion via malformed DNSKEY handling

published 2025-10-22 12 mo ago modified 2026-10-08 31 d ago also EUVD-2025-35583

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
10.7%
EPSS 10.7% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

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.

Patch / fix

  • isc bind 9.18.41, 9.18.41-S1, 9.20.15, 9.20.15-S1, 9.21.14
  • bind9 Debian 12 1:9.18.41-1~deb12u1
  • bind9 Debian 13 1:9.20.15-1~deb13u1
  • bind9 Debian 14 1:9.20.15-1

debian advisories DEBIAN-CVE-2025-8677

  • bind9 Ubuntu 22.04 LTS 1:9.18.39-0ubuntu0.22.04.2
  • bind9 Ubuntu 24.04 LTS 1:9.18.39-0ubuntu0.24.04.2
  • bind9 Ubuntu 25.10 1:9.20.11-1ubuntu2.1
  • bind9 Ubuntu 26.04 LTS 1:9.20.11-1ubuntu3
  • bind9 Ubuntu Pro 14.04 LTS 1:9.9.5.dfsg-3ubuntu0.19+esm15
  • bind9 Ubuntu Pro 16.04 LTS 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11
  • bind9 Ubuntu Pro 18.04 LTS 1:9.11.3+dfsg-1ubuntu1.19+esm6
  • bind9 Ubuntu Pro 20.04 LTS 1:9.18.30-0ubuntu0.20.04.2+esm1

ubuntu advisories UBUNTU-CVE-2025-8677

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind RHEL 9 32:9.16.23-40.el9_8.1
  • bind-libs RHEL 9 32:9.16.23-40.el9_8.1
  • bind-utils RHEL 9 32:9.16.23-40.el9_8.1
  • bind-chroot RHEL 9 32:9.16.23-40.el9_8.1
  • bind-license RHEL 9 32:9.16.23-40.el9_8.1
  • python3-bind RHEL 9 32:9.16.23-40.el9_8.1
  • bind-dnssec-utils RHEL 9 32:9.16.23-40.el9_8.1
  • bind hummingbird 1 9.18.48-1.hum1

red hat advisories RHSA-2026:18786RHSA-2026:6935RHSA-2025:21111RHSA-2025:21034RHSA-2025:19950RHSA-2025:19912

  • bind SLES for SAP applications 16.0, SLES 16.0 9.20.15-160000.1.1
  • bind SLE Module for Server Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 9.18.33-150600.3.18.1
  • bind SLE Module for Server Applications 15 SP7, SLE Module for Basesystem 15 SP7 9.20.15-150700.3.12.1

suse advisories SUSE-SU-2026:20085-1SUSE-SU-2025:4110-1SUSE-SU-2025:3903-1

  • bind openSUSE Leap 16.0 9.20.15-160000.1.1
  • bind openSUSE Tumbleweed 9.20.15-1.1

opensuse advisories openSUSE-SU-2026:20039-1openSUSE-SU-2025:15659-1

  • bind AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind-libs AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind-utils AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind-chroot AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind-license AlmaLinux 9 32:9.16.23-40.el9_8.1
  • python3-bind AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind-dnssec-utils AlmaLinux 9 32:9.16.23-40.el9_8.1
  • bind9.18 AlmaLinux 9 32:9.18.29-5.el9_7.2

almalinux advisories ALSA-2026:18786ALSA-2025:21111ALSA-2025:21034ALSA-2025:19950ALSA-2025:19912

  • bind Rocky Linux 9 2:9.16.23-40.el9_8.1
  • bind Rocky Linux 10 2:9.18.33-10.el10_1.2
  • bind9.18 Rocky Linux 9 2:9.18.29-5.el9_7.2

rocky linux advisories RLSA-2026:18786RLSA-2025:21034RLSA-2025:21111

  • bind Alpine 3.21, Alpine 3.20, Alpine 3.19 9.18.41-r0
  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 9.20.15-r0

alpine advisories ALPINE-CVE-2025-8677

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind CBL-Mariner 2.0 9.16.50-3
  • bind Azure Linux 3.0 9.20.15-1

azure linux advisories AZL-68733AZL-68742

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-8677 updated cvss 7.5

bind: Resource exhaustion via malformed DNSKEY handling

  • Red Hat Discovery 2 discovery 2.4.0-1763656152
    fixed: vendor fix RHSA-2025:21994
  • Red Hat Enterprise Linux AppStream (v. 9) bind 9.16.23-40.el9_8.1, bind9.18 9.18.29-4.el9_6.2, bind9.18 9.18.29-5.el9_7.2, bind-libs 9.16.23-40.el9_8.1, bind-utils 9.16.23-40.el9_8.1, bind-chroot 9.16.23-40.el9_8.1, +11 more
    fixed: vendor fix RHSA-2025:19950
  • Red Hat Enterprise Linux AppStream (v. 10) bind 9.18.33-4.el10_0.2, bind 9.18.33-10.el10_1.2, bind-libs 9.18.33-4.el10_0.2, bind-libs 9.18.33-10.el10_1.2, bind-utils 9.18.33-4.el10_0.2, bind-chroot 9.18.33-4.el10_0.2, +6 more
    fixed: vendor fix RHSA-2025:19912
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-libs 9.16.23-40.el9_8.1, bind9.18-libs 9.18.29-4.el9_6.2, bind9.18-libs 9.18.29-5.el9_7.2
    fixed: vendor fix RHSA-2025:19950
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-doc 9.18.33-4.el10_0.2, bind-doc 9.18.33-10.el10_1.2, bind-devel 9.18.33-4.el10_0.2, bind-devel 9.18.33-10.el10_1.2, bind-debuginfo 9.18.33-4.el10_0.2, bind-debuginfo 9.18.33-10.el10_1.2, +8 more
    fixed: vendor fix RHSA-2025:19912
  • Red Hat Hardened Images bind 9.18.48-1.hum1, bind-libs 9.18.48-1.hum1, bind-utils 9.18.48-1.hum1, bind-chroot 9.18.48-1.hum1, bind-dnssec-utils 9.18.48-1.hum1
    fixed: vendor fix RHSA-2026:6935
  • Red Hat OpenShift Container Platform 4.12 rhcos 412.86.202601061735
    fixed: vendor fix RHSA-2026:0316
  • Red Hat OpenShift Container Platform 4.13 rhcos 413.92.202601130113
    fixed: vendor fix RHSA-2026:0677
show 9 more
  • Red Hat OpenShift Container Platform 4.14 rhcos 414.92.202601191325
    fixed: vendor fix RHSA-2026:0996
  • Red Hat OpenShift Container Platform 4.15 rhcos 415.92.202601271320
    fixed: vendor fix RHSA-2026:1541
  • Red Hat OpenShift Container Platform 4.16 rhcos 416.94.202601071926
    fixed: vendor fix RHSA-2026:0326
  • Red Hat OpenShift Container Platform 4.17 rhcos 417.94.202601120213
    fixed: vendor fix RHSA-2026:0702
  • Red Hat OpenShift Container Platform 4.18 rhcos 418.94.202601071817
    fixed: vendor fix RHSA-2026:0332
  • Red Hat OpenShift Container Platform 4.19 rhcos 4.19.9.6.202601130152
    fixed: vendor fix RHSA-2026:0674
  • Red Hat OpenShift Container Platform 4.20 rhcos 4.20.9.6.202601052146
    fixed: vendor fix RHSA-2026:0420
  • Red Hat Discovery 2 discovery 2.4.0-1763596485 Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more Red Hat Enterprise Linux 8 bind, bind-sdb, bind9.16, bind-libs, bind-utils, bind-chroot, +14 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 dhcp, dhcp-relay, dhcp-client, dhcp-common, dhcp-server
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

10.74% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • ISC BIND 9

Classification

Weakness
  • CWE-405 Asymmetric Resource Consumption (Amplification)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.