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Rocky Linux 8 [CIQ] Security Update: python3-unbound / python3-unbound-debuginfo / unbound / etc Multiple Vulnerabilities (crlsa-2026_70754)

critical Nessus Plugin ID 356433

Synopsis

The Rocky Linux host is missing one or more security updates.

Description

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-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 CIQ 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 based on the guidance in CIQ advisory crlsa-2026_70754.

See Also

https://access.redhat.com/errata/RHSA-2026:70754

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.build.resf.org/RLSA-2026:70754

http://www.nessus.org/u?596cad81

http://www.nessus.org/u?6efc7031

Plugin Details

Severity: Critical

ID: 356433

File Name: ciq_rocky_linux_8_crlsa-2026_70754.nasl

Version: 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 98.94

Vendor

Vendor Severity: Unknown

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

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RockyLinux/release, Host/RockyLinux/rpm-list, Host/OS/extended-third-party

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