# CVE-2025-39978

## Summary

- **CVE ID:** CVE-2025-39978
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Oct 15, 2025
- **Last Modified:** Sep 8, 2026

## 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.

## Affected Products

- Linux — Linux (68fbff68dbea35f9e6f7649dd22fce492a5aedac)
- Linux — Linux (5.14)
- Linux — Linux (0)
- Linux — Linux (6.1.155)
- Linux — Linux (6.6.109)
- Linux — Linux (6.12.50)
- Linux — Linux (6.16.10)
- Linux — Linux (6.17)

## References

- [CNA](https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a)
- [CNA](https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a)
- [CNA](https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced)
- [CNA](https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414)
- [CNA](https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._