Detections
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AlmaLinux 10 : unbound (ALSA-2026:23231)

critical Nessus Plugin ID 318680

Synopsis

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

Description

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:23231 advisory.

 * unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options (CVE-2026-42944)
 * unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in Chase-Reply Messages (CVE-2026-42959)
 * unbound: Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution (CVE-2026-33278)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://errata.almalinux.org/10/ALSA-2026-23231.html

https://access.redhat.com/errata/RHSA-2026:23231

Plugin Details

Severity: Critical

ID: 318680

File Name: alma_linux_ALSA-2026-23231.nasl

Version: 1.1

Type: Local

Published: 6/4/2026

Updated: 6/4/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

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-2026-33278

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

Vulnerability Information

CPE: p-cpe:/a:alma:linux:unbound-utils, cpe:/o:alma:linux:10::appstream, p-cpe:/a:alma:linux:python3-unbound, cpe:/o:alma:linux:10::sap_hana, cpe:/o:alma:linux:10, cpe:/o:alma:linux:10::nfv, p-cpe:/a:alma:linux:unbound, cpe:/o:alma:linux:10::baseos, p-cpe:/a:alma:linux:unbound-devel, p-cpe:/a:alma:linux:unbound-libs, cpe:/o:alma:linux:10::sap, cpe:/o:alma:linux:10::supplementary, cpe:/o:alma:linux:10::resilientstorage, p-cpe:/a:alma:linux:unbound-dracut, cpe:/o:alma:linux:10::powertools, cpe:/o:alma:linux:10::highavailability, p-cpe:/a:alma:linux:unbound-anchor, cpe:/o:alma:linux:10::realtime

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/4/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-33278, CVE-2026-42944, CVE-2026-42959

CWE: 416, 824

RHSA: 2026:23231