Bug 2512003

Summary: CVE-2026-53689 libnfs: libnfs: Information disclosure and data corruption via crafted NFS server connection [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: libnfsAssignee: Xavier Bachelot <xavier>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: xavier
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["1f2d2602-a775-436a-a135-dca70c18a873"]}
Fixed In Version: libnfs-5.0.3-3.el10_2 libnfs-5.0.3-3.el10_3 libnfs-4.0.0-2.el8 libnfs-5.0.3-3.el9 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-21 04:29:19 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 12:24:01 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 2026-08-12 23:18:04 UTC
FEDORA-EPEL-2026-4b8518e95a (libnfs-5.0.3-3.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-4b8518e95a

Comment 2 Fedora Update System 2026-08-12 23:18:05 UTC
FEDORA-EPEL-2026-63cf8314b8 (libnfs-4.0.0-2.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-63cf8314b8

Comment 3 Fedora Update System 2026-08-13 00:46:16 UTC
FEDORA-EPEL-2026-4b8518e95a has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-4b8518e95a

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

Comment 4 Fedora Update System 2026-08-13 00:52:27 UTC
FEDORA-EPEL-2026-408a934234 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-408a934234

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

Comment 5 Fedora Update System 2026-08-13 01:13:36 UTC
FEDORA-EPEL-2026-63cf8314b8 has been pushed to the Fedora EPEL 8 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-63cf8314b8

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

Comment 6 Fedora Update System 2026-08-13 01:19:34 UTC
FEDORA-EPEL-2026-38a8e6473a has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-38a8e6473a

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

Comment 7 Fedora Update System 2026-08-21 04:29:19 UTC
FEDORA-EPEL-2026-4b8518e95a (libnfs-5.0.3-3.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-08-21 04:29:38 UTC
FEDORA-EPEL-2026-408a934234 (libnfs-5.0.3-3.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-08-21 04:38:46 UTC
FEDORA-EPEL-2026-63cf8314b8 (libnfs-4.0.0-2.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-08-21 04:42:23 UTC
FEDORA-EPEL-2026-38a8e6473a (libnfs-5.0.3-3.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.