BaseFortify

Publication date: 2026-01-23

Last updated on: 2026-02-26

Assigner: kernel.org

Description

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.

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Meta Information

Published

2026-01-23

Last Modified

2026-02-26

Generated

2026-07-06

AI Q&A

2026-01-23

EPSS Evaluated

2026-07-05

NVD

CVE-2025-71146

EUVD

EUVD-2026-4412

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	6.19
linux	linux_kernel	From 6.17.13 (inc) to 6.18 (exc)
linux	linux_kernel	6.12.63
linux	linux_kernel	6.18.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-401	The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel's netfilter component (nf_conncount) involves a leaked connection tracking (ct) object in certain error paths. Specifically, some error paths skip the reference counting check and return immediately, causing the ct object to be leaked. The fix ensures that the reference counting check is always called to prevent this leak.

Impact Analysis

The vulnerability can lead to resource leaks in the Linux kernel's connection tracking system, potentially causing increased memory usage or instability in network-related operations. This could degrade system performance or reliability, especially in environments relying heavily on netfilter for network traffic management.

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