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CVE-2026-42309 · cross-distro fix matrix

CVE-2026-42309: It was discovered that Pillow incorrectly handled large glyph advance

Affects 4 Linux releases across 16 (distro × package) combinations. First disclosed: 2026-05-09.

CVSS v3:MEDIUM · 5.5(NVD-published)

Fix per ecosystem

Each block below is a distro release where CVE-2026-42309 has a known fix. Run the listed command on that distro to remediate.

Ubuntu jammy

Source: Ubuntu USN

  • pillow→ fixed in9.0.1-1ubuntu0.4USN-8399-1
    sudo apt-get install --only-upgrade -y pillow
  • python-pil-doc→ fixed in9.0.1-1ubuntu0.4USN-8399-1
    sudo apt-get install --only-upgrade -y python-pil-doc
  • python3-pil→ fixed in9.0.1-1ubuntu0.4USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil
  • python3-pil.imagetk→ fixed in9.0.1-1ubuntu0.4USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil.imagetk

Ubuntu noble

Source: Ubuntu USN

  • pillow→ fixed in10.2.0-1ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y pillow
  • python-pil-doc→ fixed in10.2.0-1ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python-pil-doc
  • python3-pil→ fixed in10.2.0-1ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil
  • python3-pil.imagetk→ fixed in10.2.0-1ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil.imagetk

Ubuntu questing

Source: Ubuntu USN

  • pillow→ fixed in11.3.0-1ubuntu1.3USN-8399-1
    sudo apt-get install --only-upgrade -y pillow
  • python-pil-doc→ fixed in11.3.0-1ubuntu1.3USN-8399-1
    sudo apt-get install --only-upgrade -y python-pil-doc
  • python3-pil→ fixed in11.3.0-1ubuntu1.3USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil
  • python3-pil.imagetk→ fixed in11.3.0-1ubuntu1.3USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil.imagetk

Ubuntu resolute

Source: Ubuntu USN

  • pillow→ fixed in12.1.1-2ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y pillow
  • python-pil-doc→ fixed in12.1.1-2ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python-pil-doc
  • python3-pil→ fixed in12.1.1-2ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil
  • python3-pil.imagetk→ fixed in12.1.1-2ubuntu1.2USN-8399-1
    sudo apt-get install --only-upgrade -y python3-pil.imagetk
Are YOU affected by CVE-2026-42309?

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