CVE-2026-42310

Publication date 9 May 2026

Last updated 8 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
pillow	26.04 LTS resolute	Fixed 12.1.1-2ubuntu1.2
	25.10 questing	Fixed 11.3.0-1ubuntu1.3
	24.04 LTS noble	Fixed 10.2.0-1ubuntu1.2
	22.04 LTS jammy	Fixed 9.0.1-1ubuntu0.4
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation
pillow-python2	26.04 LTS resolute	Not in release
	25.10 questing	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
pillow	Upstream: 3bf614e

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-8399-1
Pillow vulnerabilities
8 June 2026