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RockyLinux 8 : unbound (RLSA-2026:70754)

critical Nessus Plugin ID 349671

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Synopsis

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

Description

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:70754 advisory.

 * unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis (CVE-2026-82717)

 * unbound: Unbound: Heap buffer overflow via malicious DNSSEC response (CVE-2026-81634)

 * unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY (CVE-2026-81642)

Tenable has extracted the preceding description block directly from the RockyLinux 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 packages.

See Also

https://bugzilla.redhat.com/show_bug.cgi?id=2535051

https://bugzilla.redhat.com/show_bug.cgi?id=2535054

https://bugzilla.redhat.com/show_bug.cgi?id=2535059

https://errata.rockylinux.org/RLSA-2026:70754

Plugin Details

Severity: Critical

ID: 349671

File Name: rocky_linux_RLSA-2026-70754.nasl

Version: 1.1

Type: Local

Published: 9/24/2026

Updated: 9/24/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.52

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-82717

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 10

Threat Score: 9.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS Score Source: CVE-2026-81642

Vulnerability Information

CPE: cpe:/o:rocky:linux:8, p-cpe:/a:rocky:linux:python3-unbound-debuginfo, p-cpe:/a:rocky:linux:python3-unbound, p-cpe:/a:rocky:linux:unbound-debuginfo, p-cpe:/a:rocky:linux:unbound-debugsource, p-cpe:/a:rocky:linux:unbound-devel, p-cpe:/a:rocky:linux:unbound-libs-debuginfo, p-cpe:/a:rocky:linux:unbound-libs, p-cpe:/a:rocky:linux:unbound

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-81634, CVE-2026-81642, CVE-2026-82717