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HIGH

CVE-2025-40778

CVSS v3

8.6

HIGH

EPSS Score

0.7 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bindAlmaLinux:10all versions · fixed in 32:9.18.33-10.el10_1.2and 7 other packages
  • bindAlmaLinux:9all versions · fixed in 32:9.16.23-34.el9_7.1and 9 other packages
  • bindAlmaLinux:8all versions · fixed in 32:9.11.36-16.el8_10.6and 16 other packages
  • bind9.16AlmaLinux:8all versions · fixed in 32:9.16.23-0.22.el8_10.4and 8 other packages
  • bind9.18AlmaLinux:9all versions · fixed in 32:9.18.29-5.el9_7.2and 6 other packages

Vendor advisories

  • CVE-2025-40778 Red Hat Product Security1,380 products fixed

    bind: Cache poisoning attacks with unsolicited RRs

  • RHSA-2026:6935 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

  • RHSA-2026:1541 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.61 bug fix and security update

  • RHSA-2026:0996 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.61 bug fix and security update

  • RHSA-2026:0674 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.19.22 bug fix and security update

  • RHSA-2026:0677 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.63 bug fix and security update

26 more advisories

Full record on NVD

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.

Technical details

Published
2025-10-22

Frequently asked questions

What is CVE-2025-40778?

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.

Is CVE-2025-40778 actively exploited?

Active exploitation of CVE-2025-40778 has not been confirmed. Its EPSS score was 0.7% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-40778?

CVE-2025-40778 has a CVSS v3 base score of 8.6 (HIGH severity).

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