Bug 2500600

Summary:	CVE-2026-15588 mingw-glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	mingw-glib2	Assignee:	Kalev Lember <kalevlember>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	fedora, kalevlember, manisandro, marcandre.lureau, rjones
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8c9573cd-0a4e-46e9-aabb-1eacbe3c6637"]}
Fixed In Version:	mingw-glib2-2.88.3-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-08 01:37:09 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:	2499675

Description Ganesh 2026-07-14 20:14:41 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 `GDBus` authentication denial-of-service / resource exhaustion flaw has been reported. The vulnerability involves a lack of line length limitations when `gdbusauth` reads input from a client. This can be exploited by an unauthenticated remote or local attacker to cause excessive memory and CPU consumption.

Comment 1 Sandro Mani 2026-07-29 17:30:15 UTC

*** Bug 2500602 has been marked as a duplicate of this bug. ***

Comment 2 Fedora Update System 2026-07-30 06:07:19 UTC

FEDORA-2026-2dfeac0818 (mingw-glib2-2.88.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2dfeac0818

Comment 3 Fedora Update System 2026-07-31 01:57:23 UTC

FEDORA-2026-2dfeac0818 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-2026-2dfeac0818`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2dfeac0818

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

Comment 4 Fedora Update System 2026-08-08 01:37:09 UTC

FEDORA-2026-2dfeac0818 (mingw-glib2-2.88.3-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.