USN-7975-1

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Source
https://ubuntu.com/security/notices/USN-7975-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7975-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-7975-1
Upstream
Related
Published
2026-01-22T13:35:04.509067Z
Modified
2026-02-04T02:14:33.203280Z
Summary
pyasn1 vulnerability
Details

It was discovered that pyasn1 incorrectly handled malformed RELATIVE-OIDs with excessive continuation octets. An attacker could possibly use this issue to cause pyasn1 to consume memory, leading to a denial of service.

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

cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-23490"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7975-1.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

cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-23490"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7975-1.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

cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-23490"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7975-1.json"