Is CVE-2021-25220 in the CISA KEV catalog?

No. CVE-2021-25220 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-25220?

CVE-2021-25220 has a CVSS v3 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2021-25220?

CVE-2021-25220 has an EPSS score of 3.25% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-25220?

Upgrade bind9 on debian 11 to 1:9.16.27-1~deb11u1 or later. Fixes are available for 106 affected products.

CVE & CISA-KEV Catalog

CVE-2021-25220

MEDIUMEPSS 87th pctl

6.8

CVSS v3

NVD

Description

BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BIND Supported Preview Editions: 9.11.4-S1 -> 9.11.36-S1 9.16.8-S1 -> 9.16.26-S1 Versions of BIND 9 earlier than those shown - back to 9.1.0, including Supported Preview Editions - are also believed to be affected but have not been tested as they are EOL. The cache could become poisoned with incorrect records leading to queries being made to the wrong servers, which might also result in false information being returned to clients.

CWE-444

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.16.27-1~deb11u1CVE-2021-25220

Fixed in:1:9.18.1-1CVE-2021-25220

bindRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bindRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-chrootRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-chrootRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-debuginfoRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-debuginfoRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-debugsourceRocky

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-debugsourceRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-develRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-develRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-dnssec-docRocky

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-dnssec-docRed Hat / RHEL

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-dnssec-utilsRocky

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-dnssec-utils-debuginfoRocky

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-export-develRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-export-develRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-export-libsRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-export-libsRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

bind-export-libs-debuginfoRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-export-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-libsRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-libsRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17.s390RHSA-2025:23414

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-libs-debuginfoRocky

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-libs-liteRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

bind-libs-liteRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-libs-lite-debuginfoRocky

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

bind-libs-lite-debuginfoRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-licenseRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-licenseRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-lite-develRocky

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-lite-develRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-pkcs11Red Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11Rocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-pkcs11-debuginfoRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-debuginfoRocky

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-develRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-pkcs11-develRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-libsRocky

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-libsRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-libs-debuginfoRocky

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-utilsRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-pkcs11-utilsRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-pkcs11-utils-debuginfoRocky

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-sdbRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-sdbRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-sdb-chrootRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

bind-sdb-chrootRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

bind-sdb-debuginfoRed Hat / RHEL

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

bind-sdb-debuginfoRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-utilsRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-utilsRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.17RHSA-2025:23414

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind-utils-debuginfoRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind9.16Rocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16Red Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-chrootRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-chrootRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-debuginfoRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-debugsourceRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-debugsourceRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-dnssec-utils-debuginfoRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-libsRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-libsRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-libs-debuginfoRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-licenseRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-licenseRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-utilsRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-utilsRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-utils-debuginfoRocky

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

bind9.16-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.7.el8_6.9RHSA-2025:22168

dhcpRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcpRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-clientRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-clientRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-client-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-client-debuginfoRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-commonRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-commonRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-debuginfoRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-debugsourceRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-debugsourceRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-libsRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-libsRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-libs-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-libs-debuginfoRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-relayRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-relayRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-relay-debuginfoRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-relay-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-serverRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-serverRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-server-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

dhcp-server-debuginfoRocky

Fixed in:12:4.3.6-47.el8_6.2RHSA-2024:2720

python3-bindRed Hat / RHEL

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

python3-bindRocky

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.13-6.el8_2.11RHSA-2025:21741

Fixed in:32:9.11.26-4.el8_4.8RHSA-2025:21740

Fixed in:32:9.16.23-1.el9_0.11RHSA-2025:21889

bind9Ubuntu

Fixed in:1:9.9.5.dfsg-3ubuntu0.19+esm6USN-5332-2

Fixed in:1:9.10.3.dfsg.P4-8ubuntu1.19+esm2USN-5332-2

Fixed in:1:9.11.3+dfsg-1ubuntu1.17USN-5332-1

Fixed in:1:9.16.1-0ubuntu2.10USN-5332-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

Exploit Intelligence

3.25%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch1

cert-portal.siemens.com

Vendor Advisory1

kb.isc.org

Third-Party Advisory2

Other references6

Embed a live status badge for CVE-2021-25220

Markdown

[![CVE-2021-25220](https://tridentstack.com/cve/badge/CVE-2021-25220.svg)](https://tridentstack.com/cve/CVE-2021-25220)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-25220"><img src="https://tridentstack.com/cve/badge/CVE-2021-25220.svg" alt="CVE-2021-25220"></a>

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.