RHEL 10 : rrdtool (RHSA-2026:33731)

high Nessus Plugin ID 324076

Synopsis

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

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:33731 advisory.

The round robin database (RRD) system stores and displays time-series data, such as network bandwidth, machine-room temperature, and server load average. RRDtool is a high performance data logging and graphing utility, which can be easily integrated with shell scripts, or used to create applications using its Perl, Python, Ruby, Lua, Tcl, and PHP bindings. The data is stored in a compact manner that does not expand over time, and RRDtool provides the user with useful graphs by processing the data to enforce a certain data density.

Security Fix(es):

* rrdtool: Stack buffer overflow in rrdcached handle_request_create() allows local privilege escalation via unbounded DS/RRA arguments (CVE-2026-43958)

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 rrdtool package based on the guidance in RHSA-2026:33731.

Plugin Details

Severity: High

ID: 324076

File Name: redhat-RHSA-2026-33731.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/1/2026

Updated: 7/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.98

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-43958

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:rrdtool-ruby, p-cpe:/a:redhat:enterprise_linux:python3-rrdtool, p-cpe:/a:redhat:enterprise_linux:rrdtool-lua, p-cpe:/a:redhat:enterprise_linux:rrdtool-tcl, p-cpe:/a:redhat:enterprise_linux:rrdtool-devel, p-cpe:/a:redhat:enterprise_linux:rrdtool-perl, p-cpe:/a:redhat:enterprise_linux:rrdtool-doc, p-cpe:/a:redhat:enterprise_linux:rrdtool, cpe:/o:redhat:enterprise_linux:10.2

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: 6/30/2026

Vulnerability Publication Date: 6/1/2026

Reference Information

CVE: CVE-2026-43958

CWE: 121

RHSA: 2026:33731

Detections

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