Bug 2497660

Summary:	CVE-2026-55380 python-pillow: Pillow: Denial of Service via crafted GD 2.x image file [fedora-all]
Product:	[Fedora] Fedora	Reporter:	jkelly <jkelly>
Component:	python-pillow	Assignee:	Sandro Mani <manisandro>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	epel-packagers-sig, infra-sig, manisandro, python-packagers-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["231a166a-66a8-45f3-a231-40f97d48b9a6"]}
Fixed In Version:	python-pillow-12.3.0-1.fc44 python-pillow-11.3.0-10.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-07-11 01:11:18 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:	2497455

Description jkelly 2026-07-07 09:40:37 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, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.

Comment 1 Fedora Update System 2026-07-08 08:20:32 UTC

FEDORA-2026-d86f55c21a (python-pillow-11.3.0-9.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d86f55c21a

Comment 2 Fedora Update System 2026-07-08 08:20:45 UTC

FEDORA-2026-46c4892063 (python-pillow-12.3.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-46c4892063

Comment 3 Fedora Update System 2026-07-09 01:26:38 UTC

FEDORA-2026-d86f55c21a 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-d86f55c21a`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d86f55c21a

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-09 01:45:29 UTC

FEDORA-2026-46c4892063 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-46c4892063`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-46c4892063

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-07-11 01:11:18 UTC

FEDORA-2026-46c4892063 (python-pillow-12.3.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-07-20 01:55:44 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 7 Fedora Update System 2026-07-21 01:16:03 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.