Linux Distros Unpatched Vulnerability : CVE-2026-53615

high Nessus Plugin ID 321424

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4. (CVE-2026-53615)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 321424

File Name: unpatched_CVE_2026_53615.nasl

Version: 1.8

Type: Local

Agent: unix

Family: Misc.

Published: 6/17/2026

Updated: 10/14/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

Percentile: 57.73

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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

CVSS Score Source: CVE-2026-53615

CVSS v3

Risk Factor: High

Base Score: 8

Temporal Score: 7.3

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:util-linux, p-cpe:/a:centos:centos:libblkid-devel, p-cpe:/a:centos:centos:libblkid, p-cpe:/a:centos:centos:libfdisk-devel, p-cpe:/a:centos:centos:libfdisk, p-cpe:/a:centos:centos:libmount-devel, p-cpe:/a:centos:centos:libmount, p-cpe:/a:centos:centos:libsmartcols-devel, p-cpe:/a:centos:centos:libsmartcols, p-cpe:/a:centos:centos:libuuid-devel, p-cpe:/a:centos:centos:libuuid, p-cpe:/a:centos:centos:python3-libmount, p-cpe:/a:centos:centos:util-linux-core, p-cpe:/a:centos:centos:util-linux-user, p-cpe:/a:centos:centos:util-linux, p-cpe:/a:centos:centos:uuidd, p-cpe:/a:debian:debian_linux:util-linux, 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-user, p-cpe:/a:redhat:enterprise_linux:util-linux, p-cpe:/a:redhat:enterprise_linux:uuidd

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2026-53615

Detections

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