UBUNTU-CVE-2026-59885

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Source
https://ubuntu.com/security/CVE-2026-59885
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-59885
Upstream
Published
2026-07-14T17:17:00Z
Modified
2026-07-15T19:47:50.174528497Z
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 0.6.4, the BER, CER, and DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs, so a small crafted payload containing an OID with many arcs consumes excessive CPU per decode() call and can deny service to applications that decode untrusted ASN.1 data. The corresponding encoders have the same quadratic behavior when an application re-encodes previously decoded attacker-supplied values. This issue is fixed in version 0.6.4.

References

Affected packages

Ubuntu:22.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.4.8-1
0.4.8-1ubuntu0.1
0.4.8-1ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.2"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:24.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.4.8-4
0.4.8-4ubuntu0.1
0.4.8-4ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.8-4ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:26.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.6.1-1
0.6.1-1build1
0.6.2-1
0.6.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.6.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:Pro:14.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra-legacy%2Ftrusty

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
0.1.7-1ubuntu2.1+esm1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:Pro:16.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra%2Fxenial

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
0.1.9-1ubuntu0.1~esm1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:Pro:18.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra%2Fbionic

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
0.4.2-3ubuntu0.18.04.1~esm1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"
Ubuntu:Pro:20.04:LTS
pyasn1

Package

Name
pyasn1
Purl
pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra%2Ffocal

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
0.4.2-3ubuntu0.20.04.1~esm1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59885.json"