Bug 2566012

Summary: CVE-2026-114608 pylint: pylint: Arbitrary code execution via untrusted cache deserialization [fedora-44]
Product: [Fedora] Fedora Reporter: Oleg Sushchenko <osushche>
Component: pylintAssignee: Gwyn Ciesla <gwync>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 44CC: gwync, orion
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["7129f318-e0ba-487d-8a39-c1f01e5408ff"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2559159    

Description Oleg Sushchenko 2026-11-03 17:27:46 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.

Pylint is a static code analyser for Python. From 0.15.2 until 4.0.9, Pylint stores module statistics in predictable files under PYLINT_HOME and loads those files with pickle.load on a later run. An attacker who can write to a shared, group-writable, or otherwise untrusted cache directory can replace a stats cache with crafted serialized data, causing arbitrary code to execute with the privileges of the user who next runs Pylint. The default per-user cache is not normally writable by another user. This issue is fixed in version 4.0.9.
Comment 1 Fedora Update System 2026-11-04 22:15:52 UTC 
FEDORA-2026-cd3aa9b176 (pylint-4.0.5-3.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cd3aa9b176
Comment 2 Fedora Update System 2026-11-05 03:11:09 UTC 
FEDORA-2026-cd3aa9b176 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-cd3aa9b176`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-cd3aa9b176

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