Bug 2451607

Summary:	CVE-2026-33179 fuse-sshfs: libfuse: Denial of Service via NULL pointer dereference and memory leak [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Avinash Hanwate <ahanwate>
Component:	fuse3	Assignee:	Peter Lemenkov <lemenkov>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	dwd, lemenkov, preichl, rjones, spotrh, vascom2
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["a486c466-2aca-42e2-acb4-d45783ded2f4"]}
Fixed In Version:	fuse3-3.18.2-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-03-26 10:44:49 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:	2449775

Description Avinash Hanwate 2026-03-26 05:44:16 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 Peter Lemenkov 2026-03-26 10:35:02 UTC

*** Bug 2451609 has been marked as a duplicate of this bug. ***

Comment 2 Peter Lemenkov 2026-03-26 10:35:12 UTC

*** Bug 2451610 has been marked as a duplicate of this bug. ***

Comment 3 Peter Lemenkov 2026-03-26 10:44:49 UTC

These CVEs affect libfuse3's io_uring subsystem, which was introduced in fuse3 3.18.0 and fixed in 3.18.2. Only fuse3 versions 3.18.0 and 3.18.1 are vulnerable.

fuse3-3.18.2 has already been built and pushed to stable for both rawhide (fuse3-3.18.2-1.fc45) and f44 (fuse3-3.18.2-1.fc44). f43 and older ship fuse3 3.16.x which does not include the io_uring subsystem and is not affected.