Bug 2419491

Summary:	CVE-2025-6176 brotli: Brotli decompression bomb DoS in scrapy/scrapy [fedora-42]
Product:	[Fedora] Fedora	Reporter:	Jon Moroney <jmoroney>
Component:	brotli	Assignee:	Jonathan Wright <jonathan>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	42	CC:	carl, code, jonathan, pouar, tagoh
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["5111d55a-92f4-40bf-87ee-f3e59425df94"]}
Fixed In Version:	brotli-1.2.0-1.fc42	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-12-18 01:12:02 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:	2408762

Description Jon Moroney 2025-12-05 18:06:10 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.

The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams

Comment 1 Ben Beasley 2025-12-10 12:34:07 UTC

Updating brotli to 1.2.0 will expose the Python APIs necessary to mitigate this in scrapy. The actual fix will then be updating python-scrapy to 2.13.4, https://docs.scrapy.org/en/latest/news.html#scrapy-2-13-4-2025-11-17.

Comment 2 Fedora Update System 2025-12-11 07:17:26 UTC

FEDORA-2025-9e233a4e22 (brotli-1.2.0-1.fc42 and perl-Alien-Brotli-0.2.2-11.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-9e233a4e22

Comment 3 Fedora Update System 2025-12-12 02:22:27 UTC

FEDORA-2025-9e233a4e22 has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-9e233a4e22`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-9e233a4e22

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

Comment 4 Fedora Update System 2025-12-18 01:12:02 UTC

FEDORA-2025-9e233a4e22 (brotli-1.2.0-1.fc42 and perl-Alien-Brotli-0.2.2-11.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.