---
id: CVE-2026-80715
title: 'igc: remove napi_synchronize() in igc_down()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  igc: remove napi_synchronize() in igc_down()

  When an AF_XDP zero-copy application is killed abruptly, the XSK pool is
  torn down but NAPI keeps polling. igc_clean_rx_ir…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    ad6e0df267dc96edb7de1fa0a2fb2a70645bff86
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    605585a8d89aaeb0122e9016fdaa92376897a705
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    a0f16c337691813f8d8f014c01fff5a368e08898
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    9a2b637aef4e515c2179774888441d00e8a5ae95
  - >-
    Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 <
    5ffab5b9589c50e4cfc0cf36ffd76c89422d4019
  - Linux 5.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T17:02:51.220627Z'
published: '2026-08-28'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:53.246Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80715'
references:
  - url: 'https://git.kernel.org/stable/c/ad6e0df267dc96edb7de1fa0a2fb2a70645bff86'
  - url: 'https://git.kernel.org/stable/c/605585a8d89aaeb0122e9016fdaa92376897a705'
  - url: 'https://git.kernel.org/stable/c/a0f16c337691813f8d8f014c01fff5a368e08898'
  - url: 'https://git.kernel.org/stable/c/f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2'
  - url: 'https://git.kernel.org/stable/c/3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668'
  - url: 'https://git.kernel.org/stable/c/9a2b637aef4e515c2179774888441d00e8a5ae95'
  - url: 'https://git.kernel.org/stable/c/5ffab5b9589c50e4cfc0cf36ffd76c89422d4019'
tags:
  - cve.org
epss: 0.00161
epssPercentile: 0.05293
ingestedAt: '2026-11-06T18:00:12.535Z'
---

## Overview

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

igc: remove napi_synchronize() in igc_down()

When an AF_XDP zero-copy application is killed abruptly, the XSK pool is
torn down but NAPI keeps polling. igc_clean_rx_irq_zc() then returns the
full budget on every poll, so napi_complete_done() never clears
NAPI_STATE_SCHED.

igc_down() calls napi_synchronize() before napi_disable(), so it spins
forever waiting for that bit and the interface never goes down. Drop the
napi_synchronize() and let napi_disable() do the job -- it sets
NAPI_STATE_DISABLE, which forces the stuck poll to complete. Reorder it
ahead of igc_set_queue_napi() so the NAPI mapping is cleared only after
polling has stopped, matching the recent igb fix b1e067240379.

## Affected

- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < ad6e0df267dc96edb7de1fa0a2fb2a70645bff86`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 605585a8d89aaeb0122e9016fdaa92376897a705`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < a0f16c337691813f8d8f014c01fff5a368e08898`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 9a2b637aef4e515c2179774888441d00e8a5ae95`
- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 5ffab5b9589c50e4cfc0cf36ffd76c89422d4019`
- `Linux 5.14`

## Remediation

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