ubuntu-cve-2026-53612
Vulnerability from osv_ubuntu
Published
2026-06-18 00:00
Modified
2026-06-18 00:00
Summary
Details
[Local Privilege Escalation via TOCTOU in mount(8) hook_owner.c chmod/chown]
Severity
N/A (UNKNOWN)
References
{
"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": [
"2.20.1-5.1ubuntu9",
"2.20.1-5.1ubuntu10",
"2.20.1-5.1ubuntu11",
"2.20.1-5.1ubuntu12",
"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"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdutils",
"binary_version": "1:2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "libblkid1",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "libmount1",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "libuuid1",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "mount",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "util-linux",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.27.1-6ubuntu3.10+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.27.1-6ubuntu3.10+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.26.2-6ubuntu3",
"2.27-3ubuntu1",
"2.27.1-1ubuntu2",
"2.27.1-1ubuntu3",
"2.27.1-1ubuntu4",
"2.27.1-3ubuntu1",
"2.27.1-4ubuntu1",
"2.27.1-6ubuntu1",
"2.27.1-6ubuntu2",
"2.27.1-6ubuntu3",
"2.27.1-6ubuntu3.1",
"2.27.1-6ubuntu3.2",
"2.27.1-6ubuntu3.3",
"2.27.1-6ubuntu3.4",
"2.27.1-6ubuntu3.6",
"2.27.1-6ubuntu3.7",
"2.27.1-6ubuntu3.8",
"2.27.1-6ubuntu3.9",
"2.27.1-6ubuntu3.10",
"2.27.1-6ubuntu3.10+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdutils",
"binary_version": "1:2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "fdisk",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "libblkid1",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "libmount1",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "libuuid1",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "mount",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "rfkill",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "setpriv",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "util-linux",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.31.1-0.4ubuntu3.7"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.31.1-0.4ubuntu3.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.31.1-0.4ubuntu3.7?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"2.30.2-0.1ubuntu1",
"2.30.2-0.1ubuntu2",
"2.30.2-0.1ubuntu3",
"2.31.1-0.4ubuntu2",
"2.31.1-0.4ubuntu3",
"2.31.1-0.4ubuntu3.1",
"2.31.1-0.4ubuntu3.2",
"2.31.1-0.4ubuntu3.3",
"2.31.1-0.4ubuntu3.4",
"2.31.1-0.4ubuntu3.5",
"2.31.1-0.4ubuntu3.6",
"2.31.1-0.4ubuntu3.7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdutils",
"binary_version": "1:2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "fdisk",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "libblkid1",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "libmount1",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "libuuid1",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "mount",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "rfkill",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "util-linux",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.34-0.1ubuntu9.6+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.34-0.1ubuntu9.6+esm1?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
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}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"2.34-0.1ubuntu4",
"2.34-0.1ubuntu5",
"2.34-0.1ubuntu6",
"2.34-0.1ubuntu7",
"2.34-0.1ubuntu8",
"2.34-0.1ubuntu9",
"2.34-0.1ubuntu9.1",
"2.34-0.1ubuntu9.3",
"2.34-0.1ubuntu9.4",
"2.34-0.1ubuntu9.5",
"2.34-0.1ubuntu9.6",
"2.34-0.1ubuntu9.6+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "bsdutils",
"binary_version": "1:2.37.2-4ubuntu3.5"
},
{
"binary_name": "eject",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "fdisk",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "libblkid1",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
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"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "libmount1",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "libuuid1",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "mount",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "rfkill",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "util-linux",
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},
{
"binary_name": "util-linux-locales",
"binary_version": "2.37.2-4ubuntu3.5"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.37.2-4ubuntu3.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.37.2-4ubuntu3.5?arch=source\u0026distro=jammy"
},
"ranges": [
{
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{
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}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"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"
]
},
{
"ecosystem_specific": {
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{
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},
{
"binary_name": "bsdutils",
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},
{
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},
{
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},
{
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},
{
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},
{
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"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "libsmartcols1",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "libuuid1",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "mount",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "rfkill",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "util-linux",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "util-linux-extra",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.39.3-9ubuntu6.5"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.39.3-9ubuntu6.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.39.3-9ubuntu6.5?arch=source\u0026distro=noble"
},
"ranges": [
{
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{
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}
],
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}
],
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"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"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.41-4ubuntu4.2"
},
{
"binary_name": "bsdutils",
"binary_version": "1:2.41-4ubuntu4.2"
},
{
"binary_name": "eject",
"binary_version": "2.41-4ubuntu4.2"
},
{
"binary_name": "fdisk",
"binary_version": "2.41-4ubuntu4.2"
},
{
"binary_name": "lastlog2",
"binary_version": "2.41-4ubuntu4.2"
},
{
"binary_name": "libblkid1",
"binary_version": "2.41-4ubuntu4.2"
},
{
"binary_name": "libfdisk1",
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},
{
"binary_name": "liblastlog2-2",
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},
{
"binary_name": "libmount1",
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},
{
"binary_name": "libpam-lastlog2",
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},
{
"binary_name": "libsmartcols1",
"binary_version": "2.41-4ubuntu4.2"
},
{
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},
{
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},
{
"binary_name": "mount",
"binary_version": "2.41-4ubuntu4.2"
},
{
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},
{
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},
{
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},
{
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},
{
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}
]
},
"package": {
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"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.41-4ubuntu4.2?arch=source\u0026distro=questing"
},
"ranges": [
{
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],
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],
"versions": [
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"2.41-4ubuntu2",
"2.41-4ubuntu3",
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"2.41-4ubuntu4.2"
]
},
{
"ecosystem_specific": {
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},
{
"binary_name": "bsdutils",
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},
{
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},
{
"binary_name": "fdisk",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "lastlog2",
"binary_version": "2.41.3-3ubuntu2"
},
{
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"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "libfdisk1",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "liblastlog2-2",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "libmount1",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "libpam-lastlog2",
"binary_version": "2.41.3-3ubuntu2"
},
{
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{
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{
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},
{
"binary_name": "mount",
"binary_version": "2.41.3-3ubuntu2"
},
{
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"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "util-linux",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "util-linux-extra",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "util-linux-locales",
"binary_version": "2.41.3-3ubuntu2"
},
{
"binary_name": "uuid-runtime",
"binary_version": "2.41.3-3ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "util-linux",
"purl": "pkg:deb/ubuntu/util-linux@2.41.3-3ubuntu2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"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": "[Local Privilege Escalation via TOCTOU in mount(8) hook_owner.c chmod/chown]",
"id": "UBUNTU-CVE-2026-53612",
"modified": "2026-06-18T00:00:00Z",
"published": "2026-06-18T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-53612"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-53612"
},
{
"type": "REPORT",
"url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-53612"
]
}
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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.
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