Ubuntu USN · USN-8399-1

Pillow vulnerabilities

Published: Mon, 08 Jun 2026 12:43

CVE-2026-42310CVE-2026-42308CVE-2026-42311CVE-2026-42309

Summary

Several security issues were fixed in Pillow.

Details

It was discovered that Pillow incorrectly handled large glyph advance values in fonts. An attacker could possibly use this issue to cause Pillow to crash, resulting in a denial of service. (CVE-2026-42308) It was discovered that Pillow incorrectly handled nested coordinate lists in certain APIs. An attacker could possibly use this issue to cause Pillow to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-42309) It was discovered that Pillow incorrectly handled certain malformed PDF files. An attacker could possibly use this issue to cause Pillow to use excessive resources, leading to a denial of service. (CVE-2026-42310) It was discovered that Pillow incorrectly handled certain malformed PSD files. An attacker could possibly use this issue to cause Pillow to crash, resulting in a denial of service, or to execute arbitrary code. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-42311)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu jammy

pillow→9.0.1-1ubuntu0.4apt_upgrade
Standard apt upgrade. Install 9.0.1-1ubuntu0.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y pillow
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python-pil-doc→9.0.1-1ubuntu0.4apt_upgrade
Standard apt upgrade. Install 9.0.1-1ubuntu0.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pil-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil→9.0.1-1ubuntu0.4apt_upgrade
Standard apt upgrade. Install 9.0.1-1ubuntu0.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil.imagetk→9.0.1-1ubuntu0.4apt_upgrade
Standard apt upgrade. Install 9.0.1-1ubuntu0.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil.imagetk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

pillow→10.2.0-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 10.2.0-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y pillow
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python-pil-doc→10.2.0-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 10.2.0-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pil-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil→10.2.0-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 10.2.0-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil.imagetk→10.2.0-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 10.2.0-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil.imagetk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

pillow→11.3.0-1ubuntu1.3apt_upgrade
Standard apt upgrade. Install 11.3.0-1ubuntu1.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y pillow
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python-pil-doc→11.3.0-1ubuntu1.3apt_upgrade
Standard apt upgrade. Install 11.3.0-1ubuntu1.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pil-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil→11.3.0-1ubuntu1.3apt_upgrade
Standard apt upgrade. Install 11.3.0-1ubuntu1.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil.imagetk→11.3.0-1ubuntu1.3apt_upgrade
Standard apt upgrade. Install 11.3.0-1ubuntu1.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil.imagetk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

pillow→12.1.1-2ubuntu1.2apt_upgrade
Standard apt upgrade. Install 12.1.1-2ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y pillow
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python-pil-doc→12.1.1-2ubuntu1.2apt_upgrade
Standard apt upgrade. Install 12.1.1-2ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pil-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil→12.1.1-2ubuntu1.2apt_upgrade
Standard apt upgrade. Install 12.1.1-2ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pil.imagetk→12.1.1-2ubuntu1.2apt_upgrade
Standard apt upgrade. Install 12.1.1-2ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pil.imagetk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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