CVE-2026-40192

Publication date 17 April 2026

Last updated 23 April 2026

Ubuntu priority

Medium

Why this priority?

Description

Pillow is a Python imaging library. Versions 10.3.0 through 12.1.1 did not limit the amount of GZIP-compressed data read when decoding a FITS image, making them vulnerable to decompression bomb attacks. A specially crafted FITS file could cause unbounded memory consumption, leading to denial of service (OOM crash or severe performance degradation). If users are unable to immediately upgrade, they should only open specific image formats, excluding FITS, as a workaround.

Read the notes from the security team

Status

Package Ubuntu Release Status
pillow 25.10 questing
Needs evaluation
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
pillow-python2 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Not affected

Notes

mdeslaur

Introduced in 10.3.0 with: https://github.com/python-pillow/Pillow/commit/142473c7b43a72b5dba534a26cb614b5b207ada5

Patch details

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

Package Patch details
pillow

References

Other references

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