UBUNTU-CVE-2025-68131

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Source
https://ubuntu.com/security/CVE-2025-68131
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68131.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-68131
Upstream
Published
2025-12-31T02:15:00Z
Modified
2026-01-08T06:17:34.559178Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28) persist in memory and can be accessed by subsequent CBOR messages using the sharedref tag (29). This allows an attacker-controlled message to read data from previously decoded messages if the decoder is reused across trust boundaries. Version 5.8.0 patches the issue.

References

Affected packages

Ubuntu:22.04:LTS / cbor2

Package

Name
cbor2
Purl
pkg:deb/ubuntu/cbor2@5.4.2-1build1?arch=source&distro=jammy

Affected ranges

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

Affected versions

5.*

5.2.0-4
5.2.0-4build1
5.4.2-1
5.4.2-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-cbor2",
            "binary_version": "5.4.2-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68131.json"

Ubuntu:24.04:LTS / cbor2

Package

Name
cbor2
Purl
pkg:deb/ubuntu/cbor2@5.6.2-1build1?arch=source&distro=noble

Affected ranges

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

Affected versions

5.*

5.4.6-2
5.4.6-2build1
5.5.1-1
5.6.0-1
5.6.1-1
5.6.2-1
5.6.2-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-cbor2",
            "binary_version": "5.6.2-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68131.json"

Ubuntu:25.10 / cbor2

Package

Name
cbor2
Purl
pkg:deb/ubuntu/cbor2@5.6.5-1build1?arch=source&distro=questing

Affected ranges

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

Affected versions

5.*

5.6.5-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-cbor2",
            "binary_version": "5.6.5-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68131.json"

Ubuntu:25.04 / cbor2

Package

Name
cbor2
Purl
pkg:deb/ubuntu/cbor2@5.6.5-1build1?arch=source&distro=plucky

Affected ranges

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

Affected versions

5.*

5.6.4-1
5.6.5-1
5.6.5-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-cbor2",
            "binary_version": "5.6.5-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68131.json"