What’s Vulnerable › Vulnerabilities

CVE-2025-39971: i40e: fix idx validation in config queues msg

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-15 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: i40e: fix idx validation in config queues msg Ensure idx is within range of active/initialized TCs when iterating over vf->ch[idx] in i40e_vc_config_queues_msg().

Affected products

• Linux kernel: 4.17 — fixed in 6.17

How to fix

Upgrade to a fixed version: Linux kernel 6.17. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1fa0aadade34481c567cdf4a897c0d4e4d548bd1
• https://git.kernel.org/stable/c/2cc26dac0518d2fa9b67ec813ee60e183480f98a
• https://git.kernel.org/stable/c/5c1f96123113e0bdc6d8dc2b0830184c93da9f65
• https://git.kernel.org/stable/c/8b9c7719b0987b1c6c5fc910599f3618a558dbde
• https://git.kernel.org/stable/c/a6ff2af78343eceb0f77ab1a2fe802183bc21648
• https://git.kernel.org/stable/c/bfcc1dff429d4b99ba03e40ddacc68ea4be2b32b
• https://git.kernel.org/stable/c/f1ad24c5abe1eaef69158bac1405a74b3c365115
• https://git.kernel.org/stable/c/f5f91d164af22e7147130ef8bebbdb28d8ecc6e2

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