7.5

CVE-2025-8677: isc bind 9

CVSS: 7.5v3.1HighDeferred
AliasesALPINE-CVE-2025-8677RHSA-2026:18786UBUNTU-CVE-2025-8677
Published 22-10-2025Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2025-8677 is a high (CVSS 7.5) vulnerability in isc bind 9. EPSS estimates a 10.74% chance of exploitation in the next 30 days, higher than 95.7% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
10.74%
0%100%
Medium · -0.47 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 9
DLA-4364-1DSA-6033-1MGASA-2025-0254OPENSUSE-SU-2025:15659-1OPENSUSE-SU-2026:20039-1RHSA-2025:19912

Timeline

  1. 22-10-2025
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

10.74%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

-0.47 pp

From 11.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
10.74%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat15 products
  • bind< 32:9.16.23-40.el9_8.1
  • bind-chroot< 32:9.16.23-40.el9_8.1
  • bind-debuginfo< 32:9.16.23-40.el9_8.1
  • bind-debugsource< 32:9.16.23-40.el9_8.1
  • bind-devel< 32:9.16.23-40.el9_8.1
Chainguard7 products
  • bind< 9.20.16-r0
  • bind-dev< 9.20.15-r0
  • bind-dnssec-root< 9.20.16-r0
  • bind-dnssec-tools< 9.20.16-r0
  • bind-libs< 9.20.16-r0
Wolfi7 products
  • bind< 9.20.16-r0
  • bind-dev< 9.20.15-r0
  • bind-dnssec-root< 9.20.16-r0
  • bind-dnssec-tools< 9.20.16-r0
  • bind-libs< 9.20.16-r0
Ubuntu3 products
  • bind9All versions (No fix recorded) | < 1:9.9.5.dfsg-3ubuntu0.19+esm15 | < 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11 | < 1:9.11.3+dfsg-1ubuntu1.19+esm6 | < 1:9.18.30-0ubuntu0.20.04.2+esm1 | < 1:9.18.39-0ubuntu0.22.04.2 | < 1:9.18.39-0ubuntu0.24.04.2 | < 1:9.20.11-1ubuntu2.1 | < 1:9.20.11-1ubuntu3
  • bind9-libsAll versions (No fix recorded)
  • isc-dhcpAll versions (No fix recorded)
Alpine1 product
  • bind< 9.18.41-r0 | < 9.20.15-r0
Debian1 product
  • bind9< 1:9.18.41-1~deb12u1 | < 1:9.20.15-1~deb13u1 | < 1:9.20.15-1
Isc1 product
  • bind 9≥ 9.18.0, ≤ 9.18.39 | ≥ 9.20.0, ≤ 9.20.13 | ≥ 9.21.0, ≤ 9.21.12 | ≥ 9.18.11-S1, ≤ 9.18.39-S1 | ≥ 9.20.9-S1, ≤ 9.20.13-S1

7 vendors · 35 products

References

17 links
Show all 17 references