UBUNTU-CVE-2026-59886

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Source
https://ubuntu.com/security/CVE-2026-59886
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-59886
Upstream
Published
2026-07-14T17:17:00Z
Modified
2026-07-15T19:47:51.965959470Z
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 univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. 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_version": "0.4.8-1ubuntu0.2",
            "binary_name": "pypy-pyasn1"
        },
        {
            "binary_version": "0.4.8-1ubuntu0.2",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.4.8-4ubuntu0.2",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.6.3-1",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.1.7-1ubuntu2.1+esm1",
            "binary_name": "python-pyasn1"
        },
        {
            "binary_version": "0.1.7-1ubuntu2.1+esm1",
            "binary_name": "python3-pyasn1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.1.9-1ubuntu0.1~esm1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.4.2-3ubuntu0.18.04.1~esm1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.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_version": "0.4.2-3ubuntu0.20.04.1~esm1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59886.json"