RHEL 6 : openssl (RHSA-2026:66524)

critical Nessus Plugin ID 344774

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:66524 advisory.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

* openssl: SSL_select_next_proto buffer overread (CVE-2024-5535)

* openssl: Heap Use-After-Free in OpenSSL PKCS7_verify() (CVE-2026-45447)

Bug Fix(es) and Enhancement(s):

* Openssl builds failing in rhel6 due to failing tests (JIRA:RHEL-184262)

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 affected openssl and / or openssl-static packages.

Plugin Details

Severity: Critical

ID: 344774

File Name: redhat-RHSA-2026-66524.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 9/11/2026

Updated: 9/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.37

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-45447

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

CVSS Score Source: CVE-2024-5535

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:rhel_els:6, p-cpe:/a:redhat:enterprise_linux:openssl-static, p-cpe:/a:redhat:enterprise_linux:openssl

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/11/2026

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2024-5535, CVE-2026-45447

CWE: 200, 825

RHSA: 2026:66524

Detections

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