UBUNTU-CVE-2026-42309

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Source
https://ubuntu.com/security/CVE-2026-42309
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42309.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42309
Upstream
  • CVE-2026-42309
Published
2026-05-09T06:16:00Z
Modified
2026-05-31T18:15:05.505272842Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

References

Affected packages

Ubuntu:25.10 / pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=questing

Affected ranges

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

Affected versions

11.*
11.1.0-5build1
11.3.0-1ubuntu1
11.3.0-1ubuntu1.1
11.3.0-1ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "11.3.0-1ubuntu1.2",
            "binary_name": "python3-pil"
        },
        {
            "binary_version": "11.3.0-1ubuntu1.2",
            "binary_name": "python3-pil.imagetk"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42309.json"

Ubuntu:26.04:LTS / pillow

Package

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

Affected ranges

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

Affected versions

11.*
11.3.0-1ubuntu1
11.3.0-1ubuntu2
12.*
12.0.0-1ubuntu1
12.1.1-1ubuntu1
12.1.1-2ubuntu1
12.1.1-2ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "12.1.1-2ubuntu1.1",
            "binary_name": "python3-pil"
        },
        {
            "binary_version": "12.1.1-2ubuntu1.1",
            "binary_name": "python3-pil.imagetk"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42309.json"