UnratedFix available
Open-iSNS vulnerability
It was discovered that Open-iSNS contained a double-free vulnerability when decoding malformed iSNS attributes. An unauthenticated attacker could possibly use this to cause a denial of service.
Announced Group revision 1
Original source ↗USN-8807-1
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:USN-8807-1
open-isns
Source reference: /affected/0/package/name
- Affected versions
- 0.97-2
Source reference:
/affected/0/versions0.97-2build1Source reference:
/affected/0/versions - Fixed versions
- 0.97-2ubuntu0.1~esm1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
open-isns
Source reference: /affected/1/package/name
- Affected versions
- 0.97-3
Source reference:
/affected/1/versions - Fixed versions
- 0.97-3ubuntu0.1~esm1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
open-isns
Source reference: /affected/2/package/name
- Affected versions
- 0.100-3ubuntu3
Source reference:
/affected/2/versions0.100-3ubuntu4Source reference:
/affected/2/versions0.100-3ubuntu5Source reference:
/affected/2/versions0.101-0ubuntu1Source reference:
/affected/2/versions0.101-0ubuntu2Source reference:
/affected/2/versions - Fixed versions
- 0.101-0ubuntu2.1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
open-isns
Source reference: /affected/3/package/name
- Affected versions
- 0.101-0.2
Source reference:
/affected/3/versions0.101-0.3Source reference:
/affected/3/versions0.101-0.3build1Source reference:
/affected/3/versions0.101-0.3build2Source reference:
/affected/3/versions0.101-0.3build3Source reference:
/affected/3/versions - Fixed versions
- 0.101-0.3ubuntu0.1
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
open-isns
Source reference: /affected/4/package/name
- Affected versions
- 0.101-1
Source reference:
/affected/4/versions0.101-1build1Source reference:
/affected/4/versions0.101-2Source reference:
/affected/4/versions0.101-2.1Source reference:
/affected/4/versions - Fixed versions
- 0.101-2.1ubuntu0.1
Source reference:
/affected/4/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.97-2ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "open-isns",
"purl": "pkg:deb/ubuntu/open-isns?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"0.97-2",
"0.97-2build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-55995",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libisns0",
"binary_version": "0.97-2ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-discoveryd",
"binary_version": "0.97-2ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-server",
"binary_version": "0.97-2ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-utils",
"binary_version": "0.97-2ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.97-3ubuntu0.1~esm1"
}
]
}
],
"package": {
"name": "open-isns",
"purl": "pkg:deb/ubuntu/open-isns?arch=source&distro=esm-infra%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"0.97-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-55995",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libisns0",
"binary_version": "0.97-3ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-discoveryd",
"binary_version": "0.97-3ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-server",
"binary_version": "0.97-3ubuntu0.1~esm1"
},
{
"binary_name": "open-isns-utils",
"binary_version": "0.97-3ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.101-0ubuntu2.1"
}
]
}
],
"package": {
"name": "open-isns",
"purl": "pkg:deb/ubuntu/open-isns?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.100-3ubuntu3",
"0.100-3ubuntu4",
"0.100-3ubuntu5",
"0.101-0ubuntu1",
"0.101-0ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-55995",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libisns0",
"binary_version": "0.101-0ubuntu2.1"
},
{
"binary_name": "open-isns-discoveryd",
"binary_version": "0.101-0ubuntu2.1"
},
{
"binary_name": "open-isns-server",
"binary_version": "0.101-0ubuntu2.1"
},
{
"binary_name": "open-isns-utils",
"binary_version": "0.101-0ubuntu2.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.101-0.3ubuntu0.1"
}
]
}
],
"package": {
"name": "open-isns",
"purl": "pkg:deb/ubuntu/open-isns?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.101-0.2",
"0.101-0.3",
"0.101-0.3build1",
"0.101-0.3build2",
"0.101-0.3build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-55995",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libisns0t64",
"binary_version": "0.101-0.3ubuntu0.1"
},
{
"binary_name": "open-isns-discoveryd",
"binary_version": "0.101-0.3ubuntu0.1"
},
{
"binary_name": "open-isns-server",
"binary_version": "0.101-0.3ubuntu0.1"
},
{
"binary_name": "open-isns-utils",
"binary_version": "0.101-0.3ubuntu0.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.101-2.1ubuntu0.1"
}
]
}
],
"package": {
"name": "open-isns",
"purl": "pkg:deb/ubuntu/open-isns?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.101-1",
"0.101-1build1",
"0.101-2",
"0.101-2.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-55995",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libisns0t64",
"binary_version": "0.101-2.1ubuntu0.1"
},
{
"binary_name": "open-isns-discoveryd",
"binary_version": "0.101-2.1ubuntu0.1"
},
{
"binary_name": "open-isns-server",
"binary_version": "0.101-2.1ubuntu0.1"
},
{
"binary_name": "open-isns-utils",
"binary_version": "0.101-2.1ubuntu0.1"
}
],
"availability": "No subscription required"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #13775 · Revision 1
- Added to Heist Feed
- Publisher date