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Fedora 43 : bind9-next (2026-a6efefa854)

medium Nessus Plugin ID 304848

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-a6efefa854 advisory.

 # Update to 9.21.20 (rhbz#2440560)

 ## Security Fixes:

 - Fix unbounded NSEC3 iterations when validating referrals to unsigned delegations.
 ([CVE-2026-1519](https://kb.isc.org/docs/cve-2026-1519))
 - Fix memory leaks in code preparing DNSSEC proofs of non-existence.
 ([CVE-2026-3104](https://kb.isc.org/docs/cve-2026-3104))
 - Prevent a crash in code processing queries containing a TKEY record.
 ([CVE-2026-3119](https://kb.isc.org/docs/cve-2026-3119))
 - Fix a stack use-after-return flaw in SIG(0) handling code.
 ([CVE-2026-3591](https://kb.isc.org/docs/cve-2026-3591))

 ## New Features:

 - Provide response round-trip time (RTT) counters via statistics channel.
 - Introduce max-delegation-servers configuration option.

 ## Bug Fixes:

 - Fix parsing key inactivation time in KASP code.
 - Fix the handling of key statements defined inside views.

 # Update to 9.21.19

 ## Security Fixes:

 - Fix a use-after-free error in dns_client_resolve() triggered by a DNAME response.
 - Fix a NULL pointer dereference in qp-trie cache code.
 - Immediately remove purged ADB names and entries from the SIEVE list.

 ## Feature Changes:

 - Record query time for all dnstap responses.
 - Optimize TCP source port selection on Linux.

 and multiple bug fixes.

 # Update to 9.21.18

 ## Feature Changes:

 - Enable minimal ANY answers by default.
 - Lowercase the NSEC Next Domain Name field.
 - Update requirements for system test suite.

 ## Bug Fixes:

 - Make catalog zone names and member zones' entry names case-insensitive. [GL #5693]
 - Fix implementation of BRID and HHIT record types. [GL #5710]
 - Fix implementation of DSYNC record type. [GL #5711]
 - Fix response policy and catalog zones to work with $INCLUDE directive.

 Source: https://downloads.isc.org/isc/bind9/9.21.20/doc/arm/html/notes.html#notes-for-bind-9-21-20


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-a6efefa854

Plugin Details

Severity: Medium

ID: 304848

File Name: fedora_2026-a6efefa854.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/4/2026

Updated: 4/4/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2026-3591

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-1519, CVE-2026-3104, CVE-2026-3119, CVE-2026-3591