Vulnerability-Lookup

ubuntu-cve-2026-13595

Vulnerability from osv_ubuntu

Published

2026-06-29 09:16

Modified

2026-07-09 15:15

Summary

Details

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.

Severity

6.8 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

5.3 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-13595	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-13595	REPORT
	https://github.com/util-linux/util-linux/commit/c…	REPORT
	https://github.com/util-linux/util-linux/commit/6…	REPORT
	https://github.com/util-linux/util-linux/commit/1…	REPORT
	https://access.redhat.com/errata/RHSA-2026:26573	REPORT
	https://access.redhat.com/security/cve/CVE-2026-13595	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bsdutils",
            "binary_version": "1:2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "libblkid1",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "libmount1",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "libuuid1",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "mount",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "util-linux",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "util-linux-locales",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          },
          {
            "binary_name": "uuid-runtime",
            "binary_version": "2.20.1-5.1ubuntu20.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "util-linux",
        "purl": "pkg:deb/ubuntu/util-linux@2.20.1-5.1ubuntu20.9?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "2.20.1-5.1ubuntu10",
        "2.20.1-5.1ubuntu11",
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        "2.20.1-5.1ubuntu13",
        "2.20.1-5.1ubuntu14",
        "2.20.1-5.1ubuntu15",
        "2.20.1-5.1ubuntu16",
        "2.20.1-5.1ubuntu17",
        "2.20.1-5.1ubuntu18",
        "2.20.1-5.1ubuntu19",
        "2.20.1-5.1ubuntu20",
        "2.20.1-5.1ubuntu20.1",
        "2.20.1-5.1ubuntu20.2",
        "2.20.1-5.1ubuntu20.3",
        "2.20.1-5.1ubuntu20.4",
        "2.20.1-5.1ubuntu20.6",
        "2.20.1-5.1ubuntu20.7",
        "2.20.1-5.1ubuntu20.9"
      ]
    },
    {
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          {
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        "2.31.1-0.4ubuntu3",
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        "2.31.1-0.4ubuntu3.3",
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          },
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          },
          {
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      "versions": [
        "2.41-4ubuntu4",
        "2.41.2-4ubuntu1",
        "2.41.2-4ubuntu2",
        "2.41.2-4ubuntu3",
        "2.41.3-3ubuntu1",
        "2.41.3-3ubuntu2"
      ]
    }
  ],
  "aliases": [],
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  "id": "UBUNTU-CVE-2026-13595",
  "modified": "2026-07-09T15:15:45Z",
  "published": "2026-06-29T09:16:00Z",
  "references": [
    {
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      "url": "https://ubuntu.com/security/CVE-2026-13595"
    },
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    },
    {
      "type": "REPORT",
      "url": "https://github.com/util-linux/util-linux/commit/60ca8616ac1a223bfb5a713047a37136dd9481ef"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/util-linux/util-linux/commit/132d9c8aa15a8efd0a23d8ca7ed8b98f365e84fa"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:26573"
    },
    {
      "type": "REPORT",
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  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
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      "type": "CVSS_V3"
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      "score": "medium",
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    }
  ],
  "upstream": [
    "CVE-2026-13595"
  ]
}

CVE-2026-13595 (GCVE-0-2026-13595)

Vulnerability from cvelistv5 – Published: 2026-06-29 08:06 – Updated: 2026-06-30 02:14

Title

Util-linux: util-linux: heap use-after-free in libblkid nested partition probing

Summary

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:26573	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-13595	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2494101	issue-trackingx_refsource_REDHAT
https://github.com/util-linux/util-linux/commit/c…

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 2.42.2-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-05-07 00:00

Credits

Red Hat would like to thank Thai Duong (Calif.io in collaboration with Claude and Anthropic Research) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2026-13595

Vulnerability from osv_ubuntu

CVE-2026-13595 (GCVE-0-2026-13595)

Tags

Sightings

Nomenclature