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
2026-01-27T12:56:25.684207Z
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:14.04:LTS

pyasn1

Package

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

Affected ranges

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

Affected versions

0.*

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.1.7-1ubuntu2.1",
            "binary_name": "python-pyasn1"
        },
        {
            "binary_version": "0.1.7-1ubuntu2.1",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source

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

Ubuntu:16.04:LTS

pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.1.9-1?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*

0.1.8-2
0.1.9-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.1.9-1",
            "binary_name": "pypy-pyasn1"
        },
        {
            "binary_version": "0.1.9-1",
            "binary_name": "python-pyasn1"
        },
        {
            "binary_version": "0.1.9-1",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source

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

Ubuntu:18.04:LTS

pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.2-3?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*

0.1.9-2
0.4.2-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.4.2-3",
            "binary_name": "pypy-pyasn1"
        },
        {
            "binary_version": "0.4.2-3",
            "binary_name": "python-pyasn1"
        },
        {
            "binary_version": "0.4.2-3",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source

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

Ubuntu:20.04:LTS

pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1@0.4.2-3build1?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*

0.4.2-3
0.4.2-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.4.2-3build1",
            "binary_name": "pypy-pyasn1"
        },
        {
            "binary_version": "0.4.2-3build1",
            "binary_name": "python-pyasn1"
        },
        {
            "binary_version": "0.4.2-3build1",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source

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

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 

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

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 

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

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 

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

Database specific

source

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