BaseFortify

Publication date: 2025-10-15

Last updated on: 2025-10-16

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-15

Last Modified

2025-10-16

Generated

2026-07-06

AI Q&A

2025-10-15

EPSS Evaluated

2026-07-05

NVD

CVE-2025-39978

EUVD

EUVD-2025-34594

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's octeontx2-pf driver, specifically in the function otx2_tc_add_flow(). The code frees a memory node (new_node) using kfree_rcu and then dereferences it immediately afterward, which can lead to accessing freed memory. The fix involves reordering the code to perform dereferences before freeing the memory to avoid unsafe access.

Impact Analysis

The use-after-free vulnerability can lead to undefined behavior such as system crashes, data corruption, or potential escalation of privileges if exploited. It may compromise system stability and security by allowing attackers to manipulate kernel memory improperly.

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