RHEL 10 : c-ares (RHSA-2026:98629)

high Nessus Plugin ID 379087

Synopsis

The remote Red Hat host is missing one or more security updates for c-ares.

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:98629 advisory.

The c-ares C library defines asynchronous DNS (Domain Name System) requests and provides name resolving API.

Security Fix(es):

* c-ares: c-ares: Denial of Service via unvalidated DNS header record counts (CVE-2026-69186)

* c-ares: c-ares: CPU exhaustion denial of service via unbounded DNS name compression pointer chains (CVE-2026-69184)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RHEL c-ares package based on the guidance in RHSA-2026:98629.

Plugin Details

Severity: High

ID: 379087

File Name: redhat-RHSA-2026-98629.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 11/11/2026

Updated: 11/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-69186

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS Score Source: CVE-2026-69184

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:10.3, p-cpe:/a:redhat:enterprise_linux:c-ares-devel, p-cpe:/a:redhat:enterprise_linux:c-ares

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/11/2026

Vulnerability Publication Date: 8/17/2026

Reference Information

CVE: CVE-2026-69184, CVE-2026-69186

CWE: 1284, 770

RHSA: 2026:98629

Detections

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