USN-7975-1

See a problem?
Please try reporting it to the source first.
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.test.osv.dev/v1/vulns/USN-7975-1
Upstream
Related
Published
2026-01-22T13:35:04Z
Modified
2026-06-30T18:15:12Z
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?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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_name":  "pypy-pyasn1",
            "binary_version":  "0.4.8-1ubuntu0.1"
        },
        {
            "binary_name":  "python3-pyasn1",
            "binary_version":  "0.4.8-1ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-23490",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
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?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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_name":  "python3-pyasn1",
            "binary_version":  "0.4.8-4ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-23490",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
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?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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_name":  "python3-pyasn1",
            "binary_version":  "0.6.1-1ubuntu0.1"
        }
    ]
}

Database specific

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