Bug 2566010

Summary:	CVE-2026-114608 pylint: pylint: Arbitrary code execution via untrusted cache deserialization [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Oleg Sushchenko <osushche>
Component:	pylint	Assignee:	Gwyn Ciesla <gwync>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	gwync, orion
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["7129f318-e0ba-487d-8a39-c1f01e5408ff"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
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Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2559159

Description Oleg Sushchenko 2026-11-03 17:27:33 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 22:43:42 UTC

FEDORA-2026-152c7451f3 (pylint-3.3.9-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-152c7451f3

Comment 2 Fedora Update System 2026-11-05 16:10:12 UTC

FEDORA-2026-152c7451f3 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-2026-152c7451f3`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-152c7451f3

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