Bug 2501495

Summary: CVE-2026-54058 python-pillow: Pillow: Memory disclosure or denial of service via crafted McIdas AREA image [fedora-all]
Product: [Fedora] Fedora Reporter: Praise Ogwuche <pogwuche>
Component: python-pillowAssignee: Sandro Mani <manisandro>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: epel-packagers-sig, infra-sig, manisandro, python-packagers-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["0b5afdbf-1633-464a-a059-b1f3df45b8d8"]}
Fixed In Version: python-pillow-11.3.0-10.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-21 01:16:23 UTC 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: 2500057    

Description Praise Ogwuche 2026-07-16 19:41:43 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 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. This issue is fixed in version 12.3.0.
Comment 1 Fedora Update System 2026-07-19 07:31:01 UTC 
FEDORA-2026-fc2ded926e (python-pillow-11.3.0-10.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-fc2ded926e
Comment 2 Fedora Update System 2026-07-20 01:55:55 UTC 
FEDORA-2026-fc2ded926e has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-fc2ded926e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-fc2ded926e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2026-07-21 01:16:23 UTC 
FEDORA-2026-fc2ded926e (python-pillow-11.3.0-10.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.