RHEL 8 : resource-agents (RHSA-2026:53364)

high Nessus Plugin ID 334484

Synopsis

The remote Red Hat host is missing a security update for resource-agents.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:53364 advisory.

The resource-agents packages provide the Pacemaker and RGManager service managers with a set of scripts.
These scripts interface with several services to allow operating in a high-availability (HA) environment.

Security Fix(es):

* pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values (CVE-2026-59886)

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 this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL resource-agents package based on the guidance in RHSA-2026:53364.

Plugin Details

Severity: High

ID: 334484

File Name: redhat-RHSA-2026-53364.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 8/11/2026

Updated: 8/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

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-2026-59886

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:resource-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:resource-agents-gcp, p-cpe:/a:redhat:enterprise_linux:resource-agents-paf, p-cpe:/a:redhat:enterprise_linux:resource-agents

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: 8/11/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-59886

CWE: 770

RHSA: 2026:53364

Detections

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