8.6

CVE-2025-40778: isc bind 9

CVSS: 8.6v3.1HighDeferred
AliasesALPINE-CVE-2025-40778SUSE-SU-2025:3976-1RHSA-2025:19835
Published 22-10-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-40778 is a high (CVSS 8.6) vulnerability in isc bind 9. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 50.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.67%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 31 · Related 13
DLA-4364-1DSA-6033-1MGASA-2025-0254OPENSUSE-SU-2025:15659-1OPENSUSE-SU-2026:20039-1RHSA-2025:19793

Timeline

  1. 22-10-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

0.00 pp

From 0.66% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.67%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    F76B4A606308937B0806A5256Bc1F918

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Redhat27 products
  • bind< 32:9.11.36-16.el8_10.6 | < 32:9.11.36-8.el8_8.8 | < 32:9.11.36-3.el8_6.11 | < 32:9.11.4-26.P2.el7_9.19
  • bind-chroot< 32:9.11.36-16.el8_10.6
  • bind-debuginfo< 32:9.11.36-16.el8_10.6
  • bind-debugsource< 32:9.11.36-16.el8_10.6
  • bind-devel< 32:9.11.36-16.el8_10.6
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) | < 1:9.11.3+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)
Suse2 products
  • bind&distro=SUSE Linux Enterprise Server 12 SP5-LTSS< 9.11.22-3.65.1
  • bind&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 9.11.22-3.65.1
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≥ 9.11.0, ≤ 9.16.50 | ≥ 9.18.0, ≤ 9.18.39 | ≥ 9.20.0, ≤ 9.20.13 | ≥ 9.21.0, ≤ 9.21.12 | ≥ 9.11.3-S1, ≤ 9.16.50-S1 | ≥ 9.18.11-S1, ≤ 9.18.39-S1 | ≥ 9.20.9-S1, ≤ 9.20.13-S1

8 vendors · 49 products

References

25 links
Show all 25 references