Bug 2458017

Summary: CVE-2026-6100 python3.15: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: python3.15Assignee: Python Maintainers <python-maint>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: ksurma, mhroncok, python-maint, python-packagers-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["6f18460e-6b6d-4f63-9616-88312c762bff"]}
Fixed In Version: python3.15-3.15.0~b1-1.fc44 python3.15-3.15.0~b1-1.fc43 python3.15-3.15.0~b1-1.fc42 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-05-23 00:56:47 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: 2457932    

Description Jon Moroney 2026-04-13 20:44:08 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 2026-05-13 14:05:37 UTC
FEDORA-2026-e2ada1fa1e (python3.15-3.15.0~b1-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e2ada1fa1e

Comment 2 Fedora Update System 2026-05-13 14:06:28 UTC
FEDORA-2026-e7dc1a8950 (python3.15-3.15.0~b1-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e7dc1a8950

Comment 3 Fedora Update System 2026-05-13 15:24:01 UTC
FEDORA-2026-2ee2d7abd5 (python3.15-3.15.0~b1-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2ee2d7abd5

Comment 4 Fedora Update System 2026-05-15 03:27:52 UTC
FEDORA-2026-2ee2d7abd5 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-2026-2ee2d7abd5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2ee2d7abd5

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

Comment 5 Fedora Update System 2026-05-15 03:42:32 UTC
FEDORA-2026-e2ada1fa1e 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-e2ada1fa1e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e2ada1fa1e

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

Comment 6 Fedora Update System 2026-05-15 04:05:25 UTC
FEDORA-2026-e7dc1a8950 has been pushed to the Fedora 42 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-e7dc1a8950`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e7dc1a8950

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

Comment 7 Fedora Update System 2026-05-23 00:56:47 UTC
FEDORA-2026-2ee2d7abd5 (python3.15-3.15.0~b1-1.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 2026-05-23 15:48:09 UTC
FEDORA-2026-e2ada1fa1e (python3.15-3.15.0~b1-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-05-23 16:00:43 UTC
FEDORA-2026-e7dc1a8950 (python3.15-3.15.0~b1-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.