USN-8702-1

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Source
https://ubuntu.com/security/notices/USN-8702-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8702-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8702-1
Upstream
Related
Published
2026-08-31T12:39:05Z
Modified
2026-08-31T22:26:23.131361662Z
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 LIBMOUNTFORCEMOUNT2 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 packages

Ubuntu:22.04:LTS / util-linux

Package

Name
util-linux
Purl
pkg:deb/ubuntu/util-linux?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.37.2-4ubuntu3.6

Affected versions

2.*
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

Ecosystem specific 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8702-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-13595",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-27456",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53613",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53615",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}

Ubuntu:24.04:LTS / util-linux

Package

Name
util-linux
Purl
pkg:deb/ubuntu/util-linux?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.39.3-9ubuntu6.6

Affected versions

2.*
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": "2.39.3-9ubuntu6.6"
        },
        {
            "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8702-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-13595",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-27456",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53612",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53613",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53614",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53615",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}

Ubuntu:26.04:LTS / util-linux

Package

Name
util-linux
Purl
pkg:deb/ubuntu/util-linux?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.41.3-3ubuntu2.2

Affected versions

2.*
2.41-4ubuntu4
2.41.2-4ubuntu1
2.41.2-4ubuntu2
2.41.2-4ubuntu3
2.41.3-3ubuntu1
2.41.3-3ubuntu2

Ecosystem specific 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8702-1.json"
cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-3184",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-13595",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-27456",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53612",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53613",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53614",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-53615",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}