UBUNTU-CVE-2026-119197

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Source
https://ubuntu.com/security/CVE-2026-119197
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-119197
Upstream
Downstream
Published
2026-10-29T20:17:00Z
Modified
2026-11-10T02:50:21Z
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 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.1 includes a binary-encoded REAL with a large mantissa and reaches BER, CER, or DER decode(), with or without a schema containing REAL. RealPayloadDecoder.valueDecoder repeatedly performs a left shift, OR, and suffix copy for every mantissa octet, making decode time quadratic in mantissa length. A comparatively small REAL value can hold a decoding worker on one CPU core for seconds or longer and cause availability loss. This issue is fixed in version 0.6.5.

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
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.4.8-1
0.4.8-1ubuntu0.1
0.4.8-1ubuntu0.2
0.4.8-1ubuntu0.3
0.4.8-1ubuntu0.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.4"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.8-1ubuntu0.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json"
Ubuntu:24.04:LTS
pyasn1

Package

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

Affected ranges

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

Affected versions

0.*
0.4.8-4
0.4.8-4ubuntu0.1
0.4.8-4ubuntu0.2
0.4.8-4ubuntu0.3
0.4.8-4ubuntu0.4

Ecosystem specific 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json"
Ubuntu:26.04:LTS
pyasn1

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
0.6.3-1ubuntu0.1
0.6.3-1ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.6.3-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json"
Ubuntu:26.10
pyasn1

Package

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

Affected ranges

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

Affected versions

0.*
0.6.3-1
0.6.4-1
0.6.4-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.6.4-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.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
0 Unknown 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
0.1.7-1ubuntu2.1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.1.7-1ubuntu2.1+esm2"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.1.7-1ubuntu2.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json"
Ubuntu:Pro:16.04:LTS
pyasn1

Package

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

Affected ranges

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

Affected versions

0.*
0.1.8-2
0.1.9-1
0.1.9-1ubuntu0.1~esm1
0.1.9-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.1.9-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.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
0 Unknown 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
0.4.2-3ubuntu0.18.04.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm2"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm2"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.18.04.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.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
0 Unknown 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
0.4.2-3ubuntu0.20.04.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "pypy-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm2"
        },
        {
            "binary_name": "python-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm2"
        },
        {
            "binary_name": "python3-pyasn1",
            "binary_version": "0.4.2-3ubuntu0.20.04.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119197.json"