UBUNTU-CVE-2026-3184

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Source
https://ubuntu.com/security/CVE-2026-3184
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3184.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-3184
Upstream
  • CVE-2026-3184
Published
2026-04-03T19:17:00Z
Modified
2026-05-20T16:25:16.399333280Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in util-linux. Improper hostname canonicalization in the login(1) utility, when invoked with the -h option, can modify the supplied remote hostname before setting PAM_RHOST. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names. This could lead to unauthorized access.

References

Affected packages

Ubuntu:25.10 / util-linux

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.40.2-14ubuntu1
2.41-4ubuntu2
2.41-4ubuntu3
2.41-4ubuntu4
2.41-4ubuntu4.1
2.41-4ubuntu4.2

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",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "liblastlog2-2",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "libmount1",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "libpam-lastlog2",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "libsmartcols1",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "libuuid1",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "login",
            "binary_version": "1:4.16.0-2+really2.41-4ubuntu4.2"
        },
        {
            "binary_name": "mount",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "rfkill",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "util-linux",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "util-linux-extra",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "util-linux-locales",
            "binary_version": "2.41-4ubuntu4.2"
        },
        {
            "binary_name": "uuid-runtime",
            "binary_version": "2.41-4ubuntu4.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3184.json"

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

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"
        },
        {
            "binary_name": "bsdutils",
            "binary_version": "1:2.41.3-3ubuntu2"
        },
        {
            "binary_name": "eject",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "fdisk",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "lastlog2",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "libblkid1",
            "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"
        },
        {
            "binary_name": "libsmartcols1",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "libuuid1",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "login",
            "binary_version": "1:4.16.0-2+really2.41.3-3ubuntu2"
        },
        {
            "binary_name": "mount",
            "binary_version": "2.41.3-3ubuntu2"
        },
        {
            "binary_name": "rfkill",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3184.json"