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RHEL 9 : jmc (RHSA-2026:0751)

high Nessus Plugin ID 291336

Synopsis

The remote Red Hat host is missing a security update for jmc.

Description

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0751 advisory.

 JDK Mission Control is a powerful profiler for HotSpot JVMs and has an advanced set of tools that enables efficient and detailed analysis of the extensive data collected by JDK Flight Recorder. The tool chain enables developers and administrators to collect and analyze data from Java applications running locally or deployed in production environments.

 Security Fix(es):

 * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

 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 jmc package based on the guidance in RHSA-2026:0751.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2419500

http://www.nessus.org/u?0cd220f6

https://access.redhat.com/errata/RHSA-2026:0751

Plugin Details

Severity: High

ID: 291336

File Name: redhat-RHSA-2026-0751.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/19/2026

Updated: 1/19/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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:C/I:N/A:N

CVSS Score Source: CVE-2025-66566

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:H/I:N/A:N

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:jmc, cpe:/o:redhat:rhel_eus:9.6

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: 1/19/2026

Vulnerability Publication Date: 12/5/2025

Reference Information

CVE: CVE-2025-66566

CWE: 908

RHSA: 2026:0751