Bug 2559502

Summary: CVE-2026-114645 mongo-c-driver: mongo-c-driver: Denial of Service via integer wraparound in Windows authentication [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: mongo-c-driverAssignee: Remi Collet <fedora>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: fedora
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["21538ee2-76a4-4625-a2a0-04e42c83a626"]}
Fixed In Version: mongo-c-driver-2.5.7-1.fc45 mongo-c-driver-1.30.14-1.fc44 mongo-c-driver-1.30.14-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-11-05 01:01:19 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: 2559380    

Description Ganesh 2026-10-23 08:33:00 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 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code can cause an undersized heap buffer to be allocated when an excessively long credential value is supplied in the client's connection configuration. A party able to control that client-side configuration, in conjunction with the affected authentication mechanism, can cause the driver to write outside the bounds of the allocated buffer. This may result in corruption of client process memory and denial of service of the client application. The issue affects only client builds compiled with the Windows-native authentication backend.

Comment 1 Fedora Update System 2026-10-27 07:58:58 UTC
FEDORA-2026-dbe693ee92 (mongo-c-driver-2.5.7-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-dbe693ee92

Comment 2 Fedora Update System 2026-10-27 08:12:58 UTC
FEDORA-2026-e5badbbedc (mongo-c-driver-1.30.14-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e5badbbedc

Comment 3 Fedora Update System 2026-10-28 03:18:56 UTC
FEDORA-2026-e5badbbedc 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-e5badbbedc`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e5badbbedc

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

Comment 4 Fedora Update System 2026-10-28 03:45:42 UTC
FEDORA-2026-dbe693ee92 has been pushed to the Fedora 45 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-dbe693ee92`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-dbe693ee92

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

Comment 5 Fedora Update System 2026-10-28 04:02:08 UTC
FEDORA-2026-bc9f778646 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-bc9f778646`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-bc9f778646

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

Comment 6 Fedora Update System 2026-11-05 01:01:19 UTC
FEDORA-2026-dbe693ee92 (mongo-c-driver-2.5.7-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2026-11-05 01:25:30 UTC
FEDORA-2026-bc9f778646 (mongo-c-driver-1.30.14-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-11-05 01:45:18 UTC
FEDORA-2026-e5badbbedc (mongo-c-driver-1.30.14-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.