CVE-2026-112403

Publication date 19 October 2026

Last updated 12 November 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's JPEG decoder can write a full-width scanline into a buffer sized for a requested draft scale. ImagingJpegDecode does not verify libjpeg's actual output width and component count after scaling is requested, and an 8-bit lossless SOF3 JPEG decoded by a build linked to libjpeg-turbo 3.x can ignore the requested downscaling geometry. An attacker can supply such a JPEG to an application that uses draft() or thumbnail() to request downscaling. This can corrupt heap memory, crash the process, or potentially allow code execution. Older libjpeg-turbo 2.x and IJG builds reject the SOF3 input. This issue is fixed in version 13.0.0.

Status

Package Ubuntu Release Status
pillow 26.10 stonking
Fixed in 12.3.0-1ubuntu2
26.04 LTS resolute
Fixed in 12.1.1-2ubuntu1.5
24.04 LTS noble
Fixed in 10.2.0-1ubuntu1.5
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Fixed in 5.1.0-1ubuntu0.8+esm3
16.04 LTS xenial
Fixed in 3.1.2-0ubuntu1.6+esm4
14.04 LTS trusty
Fixed in 2.3.0-1ubuntu3.4+esm6
pillow-python2 26.10 stonking Not in release
26.04 LTS resolute Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Needs evaluation

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Severity score breakdown

CVSS version:

Base score 9.2 · Critical

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Base score 9.8 · Critical

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-9064-1
    • Pillow vulnerabilities
    • 12 November 2026

Other references

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