Bug 2512002

Summary:	CVE-2026-53689 libnfs: libnfs: Information disclosure and data corruption via crafted NFS server connection [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vladimir Vasilev <vvasilev>
Component:	libnfs	Assignee:	Xavier Bachelot <xavier>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	xavier
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["1f2d2602-a775-436a-a135-dca70c18a873"]}
Fixed In Version:	libnfs-6.0.2-9.fc44 libnfs-6.0.2-9.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-14 01:18:13 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:	2487568

Description Vladimir Vasilev 2026-08-06 12:23:27 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.

libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.

Comment 1 Fedora Update System 2026-08-10 22:29:15 UTC

FEDORA-2026-2e196b6fa5 (libnfs-6.0.2-9.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2e196b6fa5

Comment 2 Fedora Update System 2026-08-10 22:29:18 UTC

FEDORA-2026-8ae1795f2b (libnfs-6.0.2-9.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-8ae1795f2b

Comment 3 Fedora Update System 2026-08-11 03:38:49 UTC

FEDORA-2026-8ae1795f2b 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-2026-8ae1795f2b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8ae1795f2b

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

Comment 4 Fedora Update System 2026-08-11 03:57:50 UTC

FEDORA-2026-2e196b6fa5 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-2026-2e196b6fa5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2e196b6fa5

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

Comment 5 Fedora Update System 2026-08-14 01:18:13 UTC

FEDORA-2026-8ae1795f2b (libnfs-6.0.2-9.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-08-19 01:11:55 UTC

FEDORA-2026-2e196b6fa5 (libnfs-6.0.2-9.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.