Bug 2492033

Summary: CVE-2026-56114 dhcpcd: dhcpcd: Denial of Service due to stack out-of-bounds write via crafted DHCPv6 message [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: dhcpcdAssignee: Petr Menšík <pemensik>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 45CC: fhrdina, mosvald, pemensik
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["64c79114-f7b1-4c67-b9e9-a81d315a1b0b"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 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: 2491842    

Description Ganesh 2026-06-23 22:41:35 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 Aoife Moloney 2026-08-17 14:58:04 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Fedora Update System 2026-10-01 07:52:44 UTC
FEDORA-2026-f6c24b91ee (dhcpcd-10.5.2-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f6c24b91ee

Comment 3 Fedora Update System 2026-10-01 07:54:14 UTC
FEDORA-2026-c39845b961 (dhcpcd-10.5.2-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-c39845b961

Comment 4 Fedora Update System 2026-10-01 07:55:54 UTC
FEDORA-2026-cf9ac55adc (dhcpcd-10.5.2-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cf9ac55adc

Comment 5 Fedora Update System 2026-10-02 02:17:02 UTC
FEDORA-2026-cf9ac55adc 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-cf9ac55adc`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-cf9ac55adc

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

Comment 6 Fedora Update System 2026-10-02 02:36:14 UTC
FEDORA-2026-f6c24b91ee 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-f6c24b91ee`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f6c24b91ee

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

Comment 7 Fedora Update System 2026-10-02 02:52:24 UTC
FEDORA-2026-c39845b961 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-c39845b961`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c39845b961

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