Linux Distros Unpatched Vulnerability : CVE-2026-13595

medium Nessus Plugin ID 323761

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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.

- A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service. (CVE-2026-13595)

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: Medium

ID: 323761

File Name: unpatched_CVE_2026_13595.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 6/30/2026

Updated: 7/18/2026

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: Low

Score: 3.5

Percentile: 51.97

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.6

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

CVSS Score Source: CVE-2026-13595

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.9

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:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:util-linux-user, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:libblkid, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:libfdisk-devel, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:redhat:enterprise_linux:libmount, p-cpe:/a:centos:centos:libsmartcols-devel, p-cpe:/a:centos:centos:util-linux-user, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:python3-libmount, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:redhat:enterprise_linux:libuuid, cpe:/o:redhat:enterprise_linux:9, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:centos:centos:uuidd, cpe:/o:centos:centos:8, p-cpe:/a:canonical:ubuntu_linux:util-linux, p-cpe:/a:redhat:enterprise_linux:libfdisk, p-cpe:/a:redhat:enterprise_linux:libblkid, p-cpe:/a:redhat:enterprise_linux:python3-libmount, p-cpe:/a:centos:centos:util-linux, p-cpe:/a:debian:debian_linux:util-linux, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:util-linux, p-cpe:/a:redhat:enterprise_linux:libmount-devel, p-cpe:/a:redhat:enterprise_linux:libsmartcols-devel, p-cpe:/a:redhat:enterprise_linux:libuuid-devel, p-cpe:/a:centos:centos:libmount-devel, p-cpe:/a:centos:centos:libuuid-devel, p-cpe:/a:centos:centos:libfdisk-devel, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:util-linux-core, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:util-linux-core, p-cpe:/a:redhat:enterprise_linux:libsmartcols, p-cpe:/a:redhat:enterprise_linux:libblkid-devel, p-cpe:/a:centos:centos:libfdisk, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:centos:centos:libuuid, p-cpe:/a:centos:centos:libmount, p-cpe:/a:redhat:enterprise_linux:uuidd, p-cpe:/a:centos:centos:libsmartcols, p-cpe:/a:centos:centos:libblkid-devel

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/29/2026

Reference Information

CVE: CVE-2026-13595

Detections

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