UBUNTU-CVE-2026-55995

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Source
https://ubuntu.com/security/CVE-2026-55995
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55995
Upstream
Published
2026-07-29T14:16:00Z
Modified
2026-08-06T03:10:21Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS. This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.

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
0 Unknown 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_name": "open-iscsi",
            "binary_version": "2.0.873-3ubuntu9"
        },
        {
            "binary_name": "open-iscsi-utils",
            "binary_version": "2.0.873-3ubuntu9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"
Ubuntu:18.04:LTS
open-isns

Package

Name
open-isns
Purl
pkg:deb/ubuntu/open-isns?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.97-2
0.97-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libisns0",
            "binary_version": "0.97-2build1"
        },
        {
            "binary_name": "open-isns-discoveryd",
            "binary_version": "0.97-2build1"
        },
        {
            "binary_name": "open-isns-server",
            "binary_version": "0.97-2build1"
        },
        {
            "binary_name": "open-isns-utils",
            "binary_version": "0.97-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_name": "iscsiuio",
            "binary_version": "2.0.874-7.1ubuntu6.5"
        },
        {
            "binary_name": "open-iscsi",
            "binary_version": "2.0.874-7.1ubuntu6.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"
open-isns

Package

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

Affected ranges

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

Affected versions

0.*
0.97-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libisns0",
            "binary_version": "0.97-3"
        },
        {
            "binary_name": "open-isns-discoveryd",
            "binary_version": "0.97-3"
        },
        {
            "binary_name": "open-isns-server",
            "binary_version": "0.97-3"
        },
        {
            "binary_name": "open-isns-utils",
            "binary_version": "0.97-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_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",
            "binary_version": "2.1.5-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"
open-isns

Package

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

Affected ranges

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

Affected versions

0.*
0.100-3ubuntu3
0.100-3ubuntu4
0.100-3ubuntu5
0.101-0ubuntu1
0.101-0ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libisns0",
            "binary_version": "0.101-0ubuntu2"
        },
        {
            "binary_name": "open-isns-discoveryd",
            "binary_version": "0.101-0ubuntu2"
        },
        {
            "binary_name": "open-isns-server",
            "binary_version": "0.101-0ubuntu2"
        },
        {
            "binary_name": "open-isns-utils",
            "binary_version": "0.101-0ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_name": "iscsiuio",
            "binary_version": "2.1.9-3ubuntu5.4"
        },
        {
            "binary_name": "libopeniscsiusr",
            "binary_version": "2.1.9-3ubuntu5.4"
        },
        {
            "binary_name": "open-iscsi",
            "binary_version": "2.1.9-3ubuntu5.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"
open-isns

Package

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

Affected ranges

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

Affected versions

0.*
0.101-0.2
0.101-0.3
0.101-0.3build1
0.101-0.3build2
0.101-0.3build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libisns0t64",
            "binary_version": "0.101-0.3build3"
        },
        {
            "binary_name": "open-isns-discoveryd",
            "binary_version": "0.101-0.3build3"
        },
        {
            "binary_name": "open-isns-server",
            "binary_version": "0.101-0.3build3"
        },
        {
            "binary_name": "open-isns-utils",
            "binary_version": "0.101-0.3build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_name": "iscsiuio",
            "binary_version": "2.1.11-3ubuntu3"
        },
        {
            "binary_name": "libopeniscsiusr",
            "binary_version": "2.1.11-3ubuntu3"
        },
        {
            "binary_name": "open-iscsi",
            "binary_version": "2.1.11-3ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"
open-isns

Package

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

Affected ranges

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

Affected versions

0.*
0.101-1
0.101-1build1
0.101-2
0.101-2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libisns0t64",
            "binary_version": "0.101-2.1"
        },
        {
            "binary_name": "open-isns-discoveryd",
            "binary_version": "0.101-2.1"
        },
        {
            "binary_name": "open-isns-server",
            "binary_version": "0.101-2.1"
        },
        {
            "binary_name": "open-isns-utils",
            "binary_version": "0.101-2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_name": "open-iscsi",
            "binary_version": "2.0.873+git0.3b4b4500-14ubuntu3.7+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.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
0 Unknown 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_name": "iscsiuio",
            "binary_version": "2.0.874-5ubuntu2.11+esm1"
        },
        {
            "binary_name": "open-iscsi",
            "binary_version": "2.0.874-5ubuntu2.11+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"