Detections
Analytics
RHEL 10 : util-linux (RHSA-2026:93461)
high Nessus Plugin ID 374940
Synopsis
The remote Red Hat host is missing one or more security updates for util-linux.Description
The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:93461 advisory.The util-linux packages contain a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, these include the fdisk configuration tool and the login program.
Security Fix(es):
* util-linux: TOCTOU in the mount program when setting up loop devices (CVE-2026-27456)
* util-linux: util-linux: heap use-after-free in libblkid nested partition probing (CVE-2026-13595)
* util-linux: TOCTOU in the mount program via ancestor directory swap on target path (CVE-2026-53613)
* util-linux: util-linux: TOCTOU in the mount program when applying post-mount ownership/mode changes (CVE-2026-53612)
* util-linux: util-linux: SUID mount(8) allows nosuid/noexec bypass via LIBMOUNT_FORCE_MOUNT2 (CVE-2026-53614)
* util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks (CVE-2026-76642)
* util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority (CVE-2026-78408)
* util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection (CVE-2026-78410)
* util-linux: util-linux: Partition metadata compromise via integer overflow in DOS partition parser (CVE-2026-53615)
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 util-linux package based on the guidance in RHSA-2026:93461.See Also
https://access.redhat.com/errata/RHSA-2026:93461
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2454956
https://bugzilla.redhat.com/show_bug.cgi?id=2494101
https://bugzilla.redhat.com/show_bug.cgi?id=2519646
https://bugzilla.redhat.com/show_bug.cgi?id=2519647
https://bugzilla.redhat.com/show_bug.cgi?id=2519648
https://bugzilla.redhat.com/show_bug.cgi?id=2521999
https://bugzilla.redhat.com/show_bug.cgi?id=2522497
https://bugzilla.redhat.com/show_bug.cgi?id=2522684
Plugin Details
Severity: High
ID: 374940
File Name: redhat-RHSA-2026-93461.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/2/2026
Updated: 11/2/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.52
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: Medium
Base Score: 4.5
Temporal Score: 3.5
Vector: CVSS2#AV:L/AC:H/Au:S/C:P/I:N/A:C
CVSS Score Source: CVE-2026-13595
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.8
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.5
Threat Score: 7.1
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-76642
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:libblkid-devel, p-cpe:/a:redhat:enterprise_linux:libblkid, p-cpe:/a:redhat:enterprise_linux:libfdisk-devel, p-cpe:/a:redhat:enterprise_linux:libfdisk, p-cpe:/a:redhat:enterprise_linux:libmount-devel, p-cpe:/a:redhat:enterprise_linux:libmount, p-cpe:/a:redhat:enterprise_linux:libsmartcols-devel, p-cpe:/a:redhat:enterprise_linux:libsmartcols, p-cpe:/a:redhat:enterprise_linux:libuuid-devel, p-cpe:/a:redhat:enterprise_linux:libuuid, p-cpe:/a:redhat:enterprise_linux:python3-libmount, p-cpe:/a:redhat:enterprise_linux:util-linux-core, p-cpe:/a:redhat:enterprise_linux:util-linux, p-cpe:/a:redhat:enterprise_linux:uuidd
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: 11/2/2026
Vulnerability Publication Date: 4/1/2026
Reference Information
CVE: CVE-2026-13595, CVE-2026-27456, CVE-2026-53612, CVE-2026-53613, CVE-2026-53614, CVE-2026-53615, CVE-2026-76642, CVE-2026-78408, CVE-2026-78410