usn-8702-1
Vulnerability from osv_ubuntu
Published
2026-08-31 12:39
Modified
2026-08-31 12:39
Summary
util-linux vulnerabilities
Details
It was discovered that libblkid in util-linux had a heap use-after-free vulnerability during nested partition probing. An attacker who could present a crafted block device image could possibly use this issue to obtain sensitive information or cause a denial of service. (CVE-2026-13595)
It was discovered that the mount utility in util-linux had a time-of-check- time-of-use vulnerability when setting up loop devices. A local attacker could possibly use this issue to obtain unauthorized read access to root- protected files and block devices. (CVE-2026-27456)
It was discovered that the login utility in util-linux improperly canonicalized hostnames when invoked with the -h option. A remote attacker could possibly use this issue to bypass host-based access control rules. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-3184)
It was discovered that libmount in util-linux had a time-of-check-time-of- use vulnerability in its ownership hook. A local attacker could possibly use this issue to gain elevated privileges. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53612)
It was discovered that libmount in util-linux had a time-of-check-time-of- use vulnerability that allowed target path redirection during mount operations. A local attacker could possibly use this issue to gain elevated privileges. (CVE-2026-53613)
It was discovered that libmount in util-linux improperly handled the LIBMOUNT_FORCE_MOUNT2 environment variable in the SUID mount utility. A local attacker could possibly use this issue to bypass nosuid and noexec mount options and gain elevated privileges. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53614)
It was discovered that libblkid in util-linux had an integer overflow vulnerability when parsing DOS partition tables. An attacker who could present a crafted block device image could possibly use this issue to cause a denial of service. (CVE-2026-53615)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-13595",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-27456",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53613",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53615",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "bsdutils",
"binary_version": "1:2.37.2-4ubuntu3.6"
},
{
"binary_name": "eject",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "fdisk",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "libblkid1",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "libmount1",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "libuuid1",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "mount",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "rfkill",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "util-linux",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.37.2-4ubuntu3.6"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.37.2-4ubuntu3.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.37.2-4ubuntu3.6?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37.2-4ubuntu3.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.36.1-8ubuntu1",
"2.37.2-4ubuntu1",
"2.37.2-4ubuntu2",
"2.37.2-4ubuntu3",
"2.37.2-4ubuntu3.3",
"2.37.2-4ubuntu3.4",
"2.37.2-4ubuntu3.5"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-13595",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-27456",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53612",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53613",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53614",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53615",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "bsdutils",
"binary_version": "1:2.39.3-9ubuntu6.6"
},
{
"binary_name": "eject",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "fdisk",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "libblkid1",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "libmount1",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "libuuid1",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "mount",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "rfkill",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "util-linux",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "util-linux-extra",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.39.3-9ubuntu6.6"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.39.3-9ubuntu6.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.39.3-9ubuntu6.6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.39.3-9ubuntu6.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.39.1-4ubuntu2",
"2.39.2-6ubuntu1",
"2.39.3-6ubuntu2",
"2.39.3-9ubuntu2",
"2.39.3-9ubuntu4",
"2.39.3-9ubuntu6",
"2.39.3-9ubuntu6.1",
"2.39.3-9ubuntu6.2",
"2.39.3-9ubuntu6.3",
"2.39.3-9ubuntu6.4",
"2.39.3-9ubuntu6.5"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-3184",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-13595",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-27456",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53612",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53613",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53614",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-53615",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "bsdutils",
"binary_version": "1:2.41.3-3ubuntu2.2"
},
{
"binary_name": "eject",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "fdisk",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "lastlog2",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libblkid1",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "liblastlog2-2",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libmount1",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libpam-lastlog2",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "libuuid1",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "login",
"binary_version": "1:4.16.0-2+really2.41.3-3ubuntu2.2"
},
{
"binary_name": "mount",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "rfkill",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "util-linux",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "util-linux-extra",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.41.3-3ubuntu2.2"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.41.3-3ubuntu2.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.41.3-3ubuntu2.2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.41.3-3ubuntu2.2"
}
],
"type": "ECOSYSTEM"
}
],
"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": [],
"details": "It was discovered that libblkid in util-linux had a heap use-after-free\nvulnerability during nested partition probing. An attacker who could\npresent a crafted block device image could possibly use this issue to\nobtain sensitive information or cause a denial of service. (CVE-2026-13595)\n\nIt was discovered that the mount utility in util-linux had a time-of-check-\ntime-of-use vulnerability when setting up loop devices. A local attacker\ncould possibly use this issue to obtain unauthorized read access to root-\nprotected files and block devices. (CVE-2026-27456)\n\nIt was discovered that the login utility in util-linux improperly\ncanonicalized hostnames when invoked with the -h option. A remote attacker\ncould possibly use this issue to bypass host-based access control rules.\nThis issue only affected Ubuntu 26.04 LTS. (CVE-2026-3184)\n\nIt was discovered that libmount in util-linux had a time-of-check-time-of-\nuse vulnerability in its ownership hook. A local attacker could possibly\nuse this issue to gain elevated privileges. This issue only affected Ubuntu\n24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53612)\n\nIt was discovered that libmount in util-linux had a time-of-check-time-of-\nuse vulnerability that allowed target path redirection during mount\noperations. A local attacker could possibly use this issue to gain elevated\nprivileges. (CVE-2026-53613)\n\nIt was discovered that libmount in util-linux improperly handled the\nLIBMOUNT_FORCE_MOUNT2 environment variable in the SUID mount utility. A\nlocal attacker could possibly use this issue to bypass nosuid and noexec\nmount options and gain elevated privileges. This issue only affected Ubuntu\n24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53614)\n\nIt was discovered that libblkid in util-linux had an integer overflow\nvulnerability when parsing DOS partition tables. An attacker who could\npresent a crafted block device image could possibly use this issue to cause\na denial of service. (CVE-2026-53615)",
"id": "USN-8702-1",
"modified": "2026-08-31T12:39:05Z",
"published": "2026-08-31T12:39:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8702-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-3184"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-13595"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-27456"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-53612"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-53613"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-53614"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-53615"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "util-linux vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-3184",
"UBUNTU-CVE-2026-13595",
"UBUNTU-CVE-2026-27456",
"UBUNTU-CVE-2026-53612",
"UBUNTU-CVE-2026-53613",
"UBUNTU-CVE-2026-53614",
"UBUNTU-CVE-2026-53615"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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