Bug 2500601

Summary:	CVE-2026-15588 glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	glib2	Assignee:	Matthias Clasen <mclasen>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	avovk, gnome-sig, lpavan, mclasen, rhughes, rstrode
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8c9573cd-0a4e-46e9-aabb-1eacbe3c6637"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-26 00:57:02 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:	2499675

Description Ganesh 2026-07-14 20:14:53 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 lpavan 2026-08-10 15:09:10 UTC

Is this a duplicate of https://bugzilla.redhat.com/show_bug.cgi?id=2500599?

Comment 2 Aoife Moloney 2026-08-17 15:19:53 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 3 Adrian Vovk 2026-08-26 00:57:02 UTC


*** This bug has been marked as a duplicate of bug 2500599 ***