Bug 2448652

Summary: CVE-2026-27459 pyOpenSSL: DTLS cookie callback buffer overflow [fedora-all]
Product: [Fedora] Fedora Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: pyOpenSSLAssignee: Paul Wouters <paul.wouters>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: crypto-team, jeremy, jonathan, paul.wouters, tm
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---Flags: fedora-admin-xmlrpc: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["fc33927f-a7c2-400c-8bae-14f82a50e319"]}
Fixed In Version: pyOpenSSL-26.0.0-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-03-27 01:17:54 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: 2448503    

Description Guilherme de Almeida Suckevicz 2026-03-18 16:33:57 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 Fedora Update System 2026-03-18 18:21:58 UTC
FEDORA-2026-5697f4e025 (pyOpenSSL-26.0.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5697f4e025

Comment 2 Fedora Update System 2026-03-19 01:30:53 UTC
FEDORA-2026-5697f4e025 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-2026-5697f4e025`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5697f4e025

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

Comment 3 Fedora Update System 2026-03-19 13:35:31 UTC
FEDORA-2026-9d5b9f45ec (kryoptic-1.5.0-2.fc43, pyOpenSSL-26.0.0-1.fc43, and 6 more) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-9d5b9f45ec

Comment 4 Fedora Update System 2026-03-20 02:08:00 UTC
FEDORA-2026-9d5b9f45ec 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-2026-9d5b9f45ec`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-9d5b9f45ec

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

Comment 5 Fedora Update System 2026-03-27 01:17:54 UTC
FEDORA-2026-9d5b9f45ec (kryoptic-1.5.0-2.fc43, pyOpenSSL-26.0.0-1.fc43, and 6 more) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-03-31 00:16:47 UTC
FEDORA-2026-5697f4e025 (pyOpenSSL-26.0.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.