Bug 2559473

Summary:	CVE-2026-111497 mingw-qt5-qtwebkit: Out-of-Bounds Write in Google Brotli Decoder [fedora-44]
Product:	[Fedora] Fedora	Reporter:	Srikanth Balasubramanian <sbalasub>
Component:	mingw-qt5-qtwebkit	Assignee:	Sandro Mani <manisandro>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	44	CC:	dobrotivyclovek, kde-sig, manisandro
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["e952c9d9-471d-4c9c-9b03-af60a2ac341b"]}
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:	2558973

Description Srikanth Balasubramanian 2026-10-23 06:53:07 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.

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.





Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

Comment 1 Fedora Update System 2026-10-26 08:11:38 UTC

FEDORA-2026-a336a99528 (mingw-qt5-qtwebkit-5.212.0-0.46.alpha4.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a336a99528

Comment 2 Fedora Update System 2026-10-27 01:57:10 UTC

FEDORA-2026-a336a99528 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-a336a99528`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a336a99528

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

Comment 3 Fedora Update System 2026-10-27 02:15:13 UTC

FEDORA-2026-5b98dd6d78 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-5b98dd6d78`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5b98dd6d78

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