CVE-2025-39978
Unknown Unknown - Not Provided
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.
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Meta Information
Published
2025-10-15
Last Modified
2025-10-16
Generated
2026-06-16
AI Q&A
2025-10-15
EPSS Evaluated
2026-06-15
NVD
CVE-2025-39978
EUVD
EUVD-2025-34594
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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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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