Bug 2563179

Summary: CVE-2026-112403 python-pillow: Pillow: Heap buffer overflow in ImagingJpegDecode [epel-all]
Product: [Fedora] Fedora EPEL Reporter: aedmond
Component: python-pillowAssignee: Sandro Mani <manisandro>
Status: MODIFIED --- QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: epel10CC: epel-packagers-sig, infra-sig, manisandro, python-packagers-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["d007e03b-a62f-4f36-9590-37505a21a5eb"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2555871    

Description aedmond 2026-10-28 20:27:15 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
Comment 1 Fedora Update System 2026-10-28 21:34:34 UTC 
FEDORA-2026-0e083ad36e (python-pillow-12.3.0-6.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-0e083ad36e
Comment 2 Fedora Update System 2026-10-28 21:34:38 UTC 
FEDORA-2026-6142c51af3 (python-pillow-12.3.0-6.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6142c51af3