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RHEL 10 : coreutils (RHSA-2026:67886)

medium Nessus Plugin ID 346281

Synopsis

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

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:67886 advisory.

 The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages.

 Security Fix(es):

 * coreutils: GNU coreutils uniq: Denial of Service and information disclosure via out-of-bounds read with multibyte input (CVE-2026-56391)

 * coreutils: GNU coreutils unexpand: Denial of Service via crafted tab stop values (CVE-2026-56392)

 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 coreutils package based on the guidance in RHSA-2026:67886.

See Also

https://access.redhat.com/errata/RHSA-2026:67886

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

https://bugzilla.redhat.com/show_bug.cgi?id=2506691

https://bugzilla.redhat.com/show_bug.cgi?id=2506694

http://www.nessus.org/u?6bd0942e

Plugin Details

Severity: Medium

ID: 346281

File Name: redhat-RHSA-2026-67886.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/16/2026

Updated: 9/16/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.64

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

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

CVSS Score Source: CVE-2026-56392

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

CVSS v4

Risk Factor: Medium

Base Score: 4.6

Threat Score: 1

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-56391

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:coreutils-single, p-cpe:/a:redhat:enterprise_linux:coreutils

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: 9/16/2026

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-56391, CVE-2026-56392

CWE: 125, 787

RHSA: 2026:67886