CVE-2025-39973
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: i40e: add validation for ring_len param The `ring_len` parameter provided by the virtual function (VF) is assigned directly to the hardware memory context (HMC) without any validation. To address this, introduce an upper boundary check for both Tx and Rx queue lengths. The maximum number of descriptors supported by the hardware is 8k-32. Additionally, enforce alignment constraints: Tx rings must be a multiple of 8, and Rx rings must be a multiple of 32.
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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-2025-39973
EUVD
EUVD-2025-34599
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 involves the Linux kernel's i40e driver where the 'ring_len' parameter provided by a virtual function (VF) was assigned directly to the hardware memory context (HMC) without validation. This could allow invalid or malicious values to be used. The fix introduced validation by adding an upper boundary check for both transmit (Tx) and receive (Rx) queue lengths, limiting them to a maximum supported by the hardware (8k-32 descriptors), and enforcing alignment constraints (Tx rings must be multiples of 8, Rx rings multiples of 32).

Impact Analysis

If exploited, this vulnerability could allow a virtual function to set invalid or out-of-bound ring lengths, potentially causing hardware memory corruption, instability, or denial of service in the network driver. This could impact system reliability and network performance.

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