Bug 2429913

Summary:	CVE-2026-0988 glib2: GLib: Denial of Service via Integer Overflow in g_buffered_input_stream_peek() [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Abhishek Raj <abhraj>
Component:	glib2	Assignee:	Matthias Clasen <mclasen>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	gnome-sig, mclasen, mcrha, rhughes, rstrode
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["f04bf282-f361-4939-b207-eefc8276bc7f"]}
Fixed In Version:	glib2-2.87.1-1.fc44 glib2-2.86.4-2.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-03-21 00:55:20 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:	2429886

Description Abhishek Raj 2026-01-15 11:38:58 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.

Comment 1 Milan Crha 2026-03-19 09:45:11 UTC

An upstream fix landed for 2.87.1 according to https://gitlab.gnome.org/GNOME/glib/-/issues/3851 . I'll backport it to f43.

Comment 2 Fedora Update System 2026-03-19 10:10:46 UTC

FEDORA-2026-5637749c07 (glib2-2.86.4-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5637749c07

Comment 3 Fedora Update System 2026-03-20 02:07:49 UTC

FEDORA-2026-5637749c07 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-2026-5637749c07`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5637749c07

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

Comment 4 Fedora Update System 2026-03-21 00:55:20 UTC

FEDORA-2026-5637749c07 (glib2-2.86.4-2.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.