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Fedora 43 : bind9-next (2026-d47a436e71)

medium Nessus Plugin ID 370493

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-d47a436e71 advisory.

 # Update to 9.21.26 (rhbz#2489832)

 ## Security Fixes:

 - Prevent excessive CPU use validating crafted DNSSEC responses. (CVE-2026-19668)
 - Require a TSIG on every message of incoming zone transfers. (CVE-2026-19033)
 - Prevent a DNSSEC downgrade of secure delegations via unrelated NSEC3 records. (CVE-2026-77119)
 - Prevent forged DNSSEC-validated NXDOMAIN responses. (CVE-2026-19941)
 - DNS64 with break-dnssec could cause an assertion failure. (CVE-2026-19666)
 - Reject oversized negative cache records. (CVE-2026-19667)
 - Prevent resolver crash with cached DNSSEC proofs. (CVE-2026-19662)
 - Discard repeated SOA, CNAME, and DNAME records when parsing DNS messages. (CVE-2026-75029)
 - Fix an unauthenticated crash on HTTPS using SIG(0). (CVE-2026-77692)
 - Cached HTTPS/SVCB aliases could exhaust resolver CPU. (CVE-2026-81736)
 - Prevent TKEY queries from terminating named without global options. (CVE-2026-76163)
 - Out-of-zone records in a zone database could be served as authoritative. (CVE-2026-78301)
 - Fix crash on wildcard answers carrying both NSEC and NSEC3 proofs. (CVE-2026-80274)
 - Following HTTPS/SVCB aliases could leak resolver cache memory. (CVE-2026-81563)

 ## Feature Changes:

 - Reject oversized and malformed DNSKEY records up front.
 - Reject out-of-zone records in zone transfers and zone files.

 ## Removed Features:

 - Remove the RFC 1918 reverse-lookup leakage warning.



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected 32:bind9-next package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-d47a436e71

Plugin Details

Severity: Medium

ID: 370493

File Name: fedora_2026-d47a436e71.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/22/2026

Updated: 10/22/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.2

Percentile: 96.33

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:P

CVSS Score Source: CVE-2026-19033

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:bind9-next

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/14/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-19033, CVE-2026-19662, CVE-2026-19666, CVE-2026-19667, CVE-2026-19668, CVE-2026-19941, CVE-2026-75029, CVE-2026-76163, CVE-2026-77119, CVE-2026-77692, CVE-2026-78301, CVE-2026-80274, CVE-2026-81563, CVE-2026-81736