UnratedFix available
util-linux vulnerabilities
Type: advisorySources: OSV
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 loc
- Products
- util-linux
- Affected 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, 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, 2.41-4ubuntu4, 2.41.2-4ubuntu1, 2.41.2-4ubuntu2, 2.41.2-4ubuntu3, 2.41.3-3ubuntu1, 2.41.3-3ubuntu2
- Fixed versions
- 2.37.2-4ubuntu3.6, 2.39.3-9ubuntu6.6, 2.41.3-3ubuntu2.2
- CVEs
- CVE-2026-13595, CVE-2026-27456, CVE-2026-3184, CVE-2026-53612, CVE-2026-53613, CVE-2026-53614, CVE-2026-53615
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:30 UTC · Revision 1
Source evidence
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 loc
osv:USN-8702-1
util-linux
Fixed versions: 2.37.2-4ubuntu3.6
util-linux
Fixed versions: 2.39.3-9ubuntu6.6
util-linux
Fixed versions: 2.41.3-3ubuntu2.2
Complete source record
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"summary": "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 loc",
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{
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{
"id": "CVE-2026-53612",
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{
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
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{
"type": "Ubuntu",
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},
{
"id": "CVE-2026-53613",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
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{
"type": "Ubuntu",
"score": "medium"
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{
"id": "CVE-2026-53614",
"severity": [
{
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
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]
},
{
"id": "CVE-2026-53615",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
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]
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],
"ecosystem": "Ubuntu:26.04:LTS"
}
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"ecosystem_specific": {
"binaries": [
{
"binary_name": "bsdextrautils",
"binary_version": "2.41.3-3ubuntu2.2"
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{
"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"
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"binary_version": "2.41.3-3ubuntu2.2"
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{
"binary_name": "liblastlog2-2",
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{
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"binary_version": "2.41.3-3ubuntu2.2"
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{
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"binary_version": "2.41.3-3ubuntu2.2"
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{
"binary_name": "login",
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},
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{
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},
{
"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"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-17T12:55:29.412361160Z",
"provider": "osv",
"upstream": [
"CVE-2026-13595",
"CVE-2026-27456",
"CVE-2026-3184",
"CVE-2026-53612",
"CVE-2026-53613",
"CVE-2026-53614",
"CVE-2026-53615",
"UBUNTU-CVE-2026-13595",
"UBUNTU-CVE-2026-27456",
"UBUNTU-CVE-2026-3184",
"UBUNTU-CVE-2026-53612",
"UBUNTU-CVE-2026-53613",
"UBUNTU-CVE-2026-53614",
"UBUNTU-CVE-2026-53615"
],
"references": [
"https://ubuntu.com/security/notices/USN-8702-1",
"https://ubuntu.com/security/CVE-2026-3184",
"https://ubuntu.com/security/CVE-2026-13595",
"https://ubuntu.com/security/CVE-2026-27456",
"https://ubuntu.com/security/CVE-2026-53612",
"https://ubuntu.com/security/CVE-2026-53613",
"https://ubuntu.com/security/CVE-2026-53614",
"https://ubuntu.com/security/CVE-2026-53615"
]
},
"related_cves": [
{
"value": "CVE-2026-13595",
"evidence": "/upstream"
},
{
"value": "CVE-2026-27456",
"evidence": "/upstream"
},
{
"value": "CVE-2026-3184",
"evidence": "/upstream"
},
{
"value": "CVE-2026-53612",
"evidence": "/upstream"
},
{
"value": "CVE-2026-53613",
"evidence": "/upstream"
},
{
"value": "CVE-2026-53614",
"evidence": "/upstream"
},
{
"value": "CVE-2026-53615",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 353822,
"published_at": "2026-08-31T12:39:05+00:00"
}