Bug 2432361 (CVE-2025-71146)

Summary:	CVE-2025-71146 kernel: Linux kernel netfilter: Denial of Service via connection tracking resource leak
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's netfilter component, specifically within `nf_conncount`. This vulnerability allows a remote attacker to cause a resource leak by triggering specific error paths that bypass connection tracking (ct) resource reference count checks. This can lead to resource exhaustion and a Denial of Service (DoS) condition on the system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-01-23 15:02:19 UTC

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conncount: fix leaked ct in error paths

There are some situations where ct might be leaked as error paths are
skipping the refcounted check and return immediately. In order to solve
it make sure that the check is always called.

Comment 1 Keith Grant 2026-01-23 17:53:27 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012325-CVE-2025-71146-96cf@gregkh/T