UBUNTU-CVE-2026-107612

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Source
https://ubuntu.com/security/CVE-2026-107612
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-107612
Upstream
  • CVE-2026-107612
Published
2026-10-13T00:00:00Z
Modified
2026-10-14T03:22:50Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Incorrect permission assignment in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to read or overwrite the inter-process communication handles used between the TightVNC service and its desktop server process. The named shared memory segment in the Global\ namespace that carries the pipe HANDLE values is created with a NULL DACL, and its name is derived from a time-seeded srand(time(0)) value that is predictable to one-second granularity. A low-privileged local process can open the mapping and tamper with the IPC channel of a service running as SYSTEM, potentially leading to disclosure of session data, privilege escalation, or denial of service.

References

Affected packages

Ubuntu:16.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.3.10-0ubuntu2
1.3.10-0ubuntu3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1.3.10-0ubuntu3"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1.3.10-0ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:18.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.3.10-0ubuntu3
1.3.10-0ubuntu4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1.3.10-0ubuntu4"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1.3.10-0ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:20.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.3.10-0ubuntu5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1.3.10-0ubuntu5"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1.3.10-0ubuntu5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:22.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=jammy

Affected ranges

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

Affected versions

1:1.*
1:1.3.10-3
1:1.3.10-5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncpasswd",
            "binary_version":  "1:1.3.10-5"
        },
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1:1.3.10-5"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1:1.3.10-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:24.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=noble

Affected ranges

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

Affected versions

1:1.*
1:1.3.10-7
1:1.3.10-7build1
1:1.3.10-7build2
1:1.3.10-8

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncpasswd",
            "binary_version":  "1:1.3.10-8"
        },
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1:1.3.10-8"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1:1.3.10-8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:26.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=resolute

Affected ranges

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

Affected versions

1:1.*
1:1.3.10-10
1:1.3.10-10build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncpasswd",
            "binary_version":  "1:1.3.10-10build1"
        },
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1:1.3.10-10build1"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1:1.3.10-10build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"
Ubuntu:Pro:14.04:LTS
tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.3.9-6.4
1.3.9-6.4ubuntu1
1.3.9-6.5+deb8u1build0.14.04.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "tightvncserver",
            "binary_version":  "1.3.9-6.5+deb8u1build0.14.04.1~esm1"
        },
        {
            "binary_name":  "xtightvncviewer",
            "binary_version":  "1.3.9-6.5+deb8u1build0.14.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107612.json"