---
id: CVE-2026-13595
title: >-
  Util-linux: util-linux: heap use-after-free in libblkid nested partition
  probing
summary: >-
  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 s…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-416
vendor: Red Hat
product: util-linux
affected:
  - util-linux (all versions)
  - costmanagement/costmanagement-ui-rhel10 (all versions)
  - util-linux-main (all versions)
  - util-linux (all versions)
  - util-linux (all versions)
  - util-linux (all versions)
  - rhoai/odh-ai-gateway-operator-rhel9
  - rhoai/odh-core-bff-rhel9
  - rhoai/odh-dashboard-operator-rhel9
  - rhoai/odh-dashboard-rhel9
  - rhoai/odh-data-science-pipelines-operator-controller-rhel9
  - rhoai/odh-kf-notebook-controller-rhel9
  - rhoai/odh-kserve-controller-rhel9
  - rhoai/odh-kserve-llmisvc-controller-rhel9
  - rhoai/odh-kserve-module-operator-rhel9
  - rhoai/odh-kuberay-operator-controller-rhel9
  - rhoai/odh-kube-rbac-proxy-rhel9
  - rhoai/odh-llama-stack-k8s-operator-rhel9
  - rhoai/odh-maas-controller-rhel9
  - rhoai/odh-mlflow-operator-rhel9
  - rhoai/odh-mlflow-rhel9
  - rhoai/odh-mod-arch-agent-ops-rhel9
  - rhoai/odh-mod-arch-automl-rhel9
  - rhoai/odh-mod-arch-autorag-rhel9
  - rhoai/odh-mod-arch-eval-hub-rhel9
  - rhoai/odh-mod-arch-gen-ai-rhel9
  - rhoai/odh-mod-arch-maas-rhel9
  - rhoai/odh-mod-arch-mlflow-rhel9
  - rhoai/odh-mod-arch-model-registry-rhel9
  - rhoai/odh-model-controller-rhel9
  - rhoai/odh-model-registry-operator-rhel9
  - rhoai/odh-model-serving-api-rhel9
  - rhoai/odh-notebook-controller-rhel9
  - rhoai/odh-ogx-k8s-operator-rhel9
  - rhoai/odh-ogx-module-operator-rhel9
  - rhoai/odh-training-operator-rhel9
  - rhoai/odh-trustyai-service-operator-rhel9
  - rhoai/odh-workbenches-operator-rhel9
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-29T13:50:15.269617Z'
published: '2026-06-29'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T07:39:26.031Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-13595'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:26573'
    label: 'RHSA-2026:26573'
  - url: 'https://access.redhat.com/errata/RHSA-2026:93461'
    label: 'RHSA-2026:93461'
  - url: 'https://access.redhat.com/errata/RHSA-2026:95365'
    label: 'RHSA-2026:95365'
  - url: 'https://access.redhat.com/security/cve/CVE-2026-13595'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2494101'
    label: RHBZ#2494101
  - url: >-
      https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c
tags:
  - cve.org
epss: 0.00144
epssPercentile: 0.03755
ingestedAt: '2026-11-05T22:38:31.419Z'
---

## Overview

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.

## Affected

- `util-linux (all versions)`
- `costmanagement/costmanagement-ui-rhel10 (all versions)`
- `util-linux-main (all versions)`
- `util-linux (all versions)`
- `util-linux (all versions)`
- `util-linux (all versions)`
- `rhoai/odh-ai-gateway-operator-rhel9`
- `rhoai/odh-core-bff-rhel9`
- `rhoai/odh-dashboard-operator-rhel9`
- `rhoai/odh-dashboard-rhel9`
- `rhoai/odh-data-science-pipelines-operator-controller-rhel9`
- `rhoai/odh-kf-notebook-controller-rhel9`
- `rhoai/odh-kserve-controller-rhel9`
- `rhoai/odh-kserve-llmisvc-controller-rhel9`
- `rhoai/odh-kserve-module-operator-rhel9`
- `rhoai/odh-kuberay-operator-controller-rhel9`
- `rhoai/odh-kube-rbac-proxy-rhel9`
- `rhoai/odh-llama-stack-k8s-operator-rhel9`
- `rhoai/odh-maas-controller-rhel9`
- `rhoai/odh-mlflow-operator-rhel9`
- `rhoai/odh-mlflow-rhel9`
- `rhoai/odh-mod-arch-agent-ops-rhel9`
- `rhoai/odh-mod-arch-automl-rhel9`
- `rhoai/odh-mod-arch-autorag-rhel9`
- `rhoai/odh-mod-arch-eval-hub-rhel9`
- `rhoai/odh-mod-arch-gen-ai-rhel9`
- `rhoai/odh-mod-arch-maas-rhel9`
- `rhoai/odh-mod-arch-mlflow-rhel9`
- `rhoai/odh-mod-arch-model-registry-rhel9`
- `rhoai/odh-model-controller-rhel9`
- `rhoai/odh-model-registry-operator-rhel9`
- `rhoai/odh-model-serving-api-rhel9`
- `rhoai/odh-notebook-controller-rhel9`
- `rhoai/odh-ogx-k8s-operator-rhel9`
- `rhoai/odh-ogx-module-operator-rhel9`
- `rhoai/odh-training-operator-rhel9`
- `rhoai/odh-trustyai-service-operator-rhel9`
- `rhoai/odh-workbenches-operator-rhel9`
- `openshift/ose-rhel-coreos-8 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.