UBUNTU-CVE-2026-18728

See a problem?
Please try reporting it to the source first.

Source

https://ubuntu.com/security/CVE-2026-18728

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-18728

Upstream

CVE-2026-18728

Published

2026-08-13T00:00:00Z

Modified

2026-08-13T19:30:14.508614498Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A flaw was found in open-iscsi. An integer underflow vulnerability in the iscsiuio component, specifically during IPv4 Dynamic Host Configuration Protocol (DHCP) parsing, allows a remote attacker on the same local network segment to cause a denial of service. By sending a specially crafted IPv4/UDP DHCP reply, the attacker can trigger an out-of-bounds read, leading to the iscsiuio process crashing. This issue affects systems where iscsiuio is actively handling IPv4 DHCP traffic.

References

Affected packages

Ubuntu:14.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.873-3ubuntu7

2.0.873-3ubuntu8

2.0.873-3ubuntu9

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.0.873-3ubuntu9",
            "binary_name": "open-iscsi"
        },
        {
            "binary_version": "2.0.873-3ubuntu9",
            "binary_name": "open-iscsi-utils"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:20.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.874-7.1ubuntu3

2.0.874-7.1ubuntu5

2.0.874-7.1ubuntu6

2.0.874-7.1ubuntu6.1

2.0.874-7.1ubuntu6.2

2.0.874-7.1ubuntu6.3

2.0.874-7.1ubuntu6.4

2.0.874-7.1ubuntu6.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.0.874-7.1ubuntu6.5",
            "binary_name": "iscsiuio"
        },
        {
            "binary_version": "2.0.874-7.1ubuntu6.5",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:22.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.4-0ubuntu1

2.1.4-0ubuntu2

2.1.4-0ubuntu3

2.1.4-0ubuntu4

2.1.5-1ubuntu1

2.1.5-1ubuntu1.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.1.5-1ubuntu1.1",
            "binary_name": "iscsiuio"
        },
        {
            "binary_version": "2.1.5-1ubuntu1.1",
            "binary_name": "libopeniscsiusr"
        },
        {
            "binary_version": "2.1.5-1ubuntu1.1",
            "binary_name": "libopeniscsiusr0.2.0"
        },
        {
            "binary_version": "2.1.5-1ubuntu1.1",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:24.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.8-1ubuntu2

2.1.9-3ubuntu1

2.1.9-3ubuntu2

2.1.9-3ubuntu3

2.1.9-3ubuntu4

2.1.9-3ubuntu5.1

2.1.9-3ubuntu5.2

2.1.9-3ubuntu5.3

2.1.9-3ubuntu5.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.1.9-3ubuntu5.4",
            "binary_name": "iscsiuio"
        },
        {
            "binary_version": "2.1.9-3ubuntu5.4",
            "binary_name": "libopeniscsiusr"
        },
        {
            "binary_version": "2.1.9-3ubuntu5.4",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:26.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.11-1ubuntu3

2.1.11-3ubuntu1

2.1.11-3ubuntu2

2.1.11-3ubuntu3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.1.11-3ubuntu3",
            "binary_name": "iscsiuio"
        },
        {
            "binary_version": "2.1.11-3ubuntu3",
            "binary_name": "libopeniscsiusr"
        },
        {
            "binary_version": "2.1.11-3ubuntu3",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:Pro:16.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.873-3ubuntu13

2.0.873+git0.3b4b4500-13ubuntu3

2.0.873+git0.3b4b4500-14ubuntu1

2.0.873+git0.3b4b4500-14ubuntu3

2.0.873+git0.3b4b4500-14ubuntu3.1

2.0.873+git0.3b4b4500-14ubuntu3.2

2.0.873+git0.3b4b4500-14ubuntu3.3

2.0.873+git0.3b4b4500-14ubuntu3.4

2.0.873+git0.3b4b4500-14ubuntu3.5

2.0.873+git0.3b4b4500-14ubuntu3.6

2.0.873+git0.3b4b4500-14ubuntu3.7

2.0.873+git0.3b4b4500-14ubuntu3.7+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.0.873+git0.3b4b4500-14ubuntu3.7+esm1",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"

Ubuntu:Pro:18.04:LTS

open-iscsi

Package

Name: open-iscsi
Purl: pkg:deb/ubuntu/open-iscsi?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.874-4ubuntu3

2.0.874-4ubuntu4

2.0.874-4ubuntu5

2.0.874-5ubuntu1

2.0.874-5ubuntu2

2.0.874-5ubuntu2.1

2.0.874-5ubuntu2.2

2.0.874-5ubuntu2.3

2.0.874-5ubuntu2.4

2.0.874-5ubuntu2.6

2.0.874-5ubuntu2.7

2.0.874-5ubuntu2.9

2.0.874-5ubuntu2.10

2.0.874-5ubuntu2.11

2.0.874-5ubuntu2.11+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.0.874-5ubuntu2.11+esm1",
            "binary_name": "iscsiuio"
        },
        {
            "binary_version": "2.0.874-5ubuntu2.11+esm1",
            "binary_name": "open-iscsi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18728.json"