---
id: CVE-2026-23313
title: 'i40e: Fix preempt count leak in napi poll tracepoint'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i40e: Fix preempt count leak in napi poll tracepoint

  Using get_cpu() in the tracepoint assignment causes an obvious preempt
  count leak because nothing invokes put_cpu(…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a <
    fa5d5baf67f619c7aa70697a194b5a9edd9f5bb7
  - >-
    Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a <
    b7e91827e1cf89cd34ad11dc8f8c010b70ab786e
  - >-
    Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a <
    9e0f091821571f0da387462803ee42f0bb157582
  - >-
    Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a <
    dca4ea596a3b0a1b82bc1d9f3e4d88bd9ad9561f
  - >-
    Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a <
    4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9
  - Linux 6.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:26:37.670446Z'
published: '2026-03-25'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:33:38.240Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-23313'
references:
  - url: 'https://git.kernel.org/stable/c/fa5d5baf67f619c7aa70697a194b5a9edd9f5bb7'
  - url: 'https://git.kernel.org/stable/c/b7e91827e1cf89cd34ad11dc8f8c010b70ab786e'
  - url: 'https://git.kernel.org/stable/c/9e0f091821571f0da387462803ee42f0bb157582'
  - url: 'https://git.kernel.org/stable/c/dca4ea596a3b0a1b82bc1d9f3e4d88bd9ad9561f'
  - url: 'https://git.kernel.org/stable/c/4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9'
tags:
  - cve.org
epss: 0.00127
epssPercentile: 0.02369
ingestedAt: '2026-11-05T22:38:32.114Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

i40e: Fix preempt count leak in napi poll tracepoint

Using get_cpu() in the tracepoint assignment causes an obvious preempt
count leak because nothing invokes put_cpu() to undo it:

  softirq: huh, entered softirq 3 NET_RX with preempt_count 00000100, exited with 00000101?

This clearly has seen a lot of testing in the last 3+ years...

Use smp_processor_id() instead.

## Affected

- `Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a < fa5d5baf67f619c7aa70697a194b5a9edd9f5bb7`
- `Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a < b7e91827e1cf89cd34ad11dc8f8c010b70ab786e`
- `Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a < 9e0f091821571f0da387462803ee42f0bb157582`
- `Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a < dca4ea596a3b0a1b82bc1d9f3e4d88bd9ad9561f`
- `Linux >= 6d4d584a7ea8fc8d2be77545cb503118c193738a < 4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9`
- `Linux 6.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.