UBUNTU-CVE-2026-23490

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Source
https://ubuntu.com/security/CVE-2026-23490
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-23490
Upstream
Downstream
Related
Published
2026-01-16T19:16:00Z
Modified
2026-03-31T18:14:24.038458Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.

References

Affected packages

Ubuntu:22.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.8-1ubuntu0.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.8-1ubuntu0.1

Affected versions

0.*
0.4.8-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.1"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:24.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.8-4ubuntu0.1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.8-4ubuntu0.1

Affected versions

0.*
0.4.8-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.8-4ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:25.10
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.6.1-1ubuntu0.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.1-1ubuntu0.1

Affected versions

0.*
0.6.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.6.1-1ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:Pro:14.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.1.7-1ubuntu2.1+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.1.7-1ubuntu2.1+esm1

Affected versions

0.*
0.1.4-0ubuntu1
0.1.7-1ubuntu1
0.1.7-1ubuntu2
0.1.7-1ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.1.7-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.1.7-1ubuntu2.1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:Pro:16.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.1.9-1ubuntu0.1~esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.1.9-1ubuntu0.1~esm1

Affected versions

0.*
0.1.8-2
0.1.9-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:Pro:18.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.2-3ubuntu0.18.04.1~esm1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.2-3ubuntu0.18.04.1~esm1

Affected versions

0.*
0.1.9-2
0.4.2-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm1"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm1"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"
Ubuntu:Pro:20.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.2-3ubuntu0.20.04.1~esm1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.2-3ubuntu0.20.04.1~esm1

Affected versions

0.*
0.4.2-3
0.4.2-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm1"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm1"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23490.json"