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CVE-2025-39978
octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()
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.

INFO

Published Date :

Oct. 15, 2025, 8:15 a.m.

Last Modified :

Oct. 16, 2025, 3:29 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-39978 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Reorder operations to dereference before freeing memory to prevent use-after-free.
  • Dereference new_node before queuing its free.
  • Ensure RCU safety by reordering operations.
  • Update the Linux kernel to the latest version.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-39978.

URL Resource
https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a
https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414
https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced
https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56
https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-39978 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-39978 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-39978 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-39978 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 15, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a
    Added Reference https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414
    Added Reference https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced
    Added Reference https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56
    Added Reference https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
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