---
id: CVE-2026-90113
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netdevsim: update queue NAPI association on queue reset

  In netdevsim, receive queues (struct nsim_rq) embed their own struct
  napi_struct
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netdevsim: update queue NAPI association on queue reset

  In netdevsim, receive queues (struct nsim_rq) embed their own struct
  napi_struct. When queue reset is performed…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5bc8e8dbef27b73bd7b6d1fd5108b4fd4c6d469f <
    b8f32b0804b4bf0cba0ee0a093e3fd74f11d7166
  - >-
    Linux >= 5bc8e8dbef27b73bd7b6d1fd5108b4fd4c6d469f <
    db038ac4dca0fa626199e9c297eddd8362be0550
  - >-
    Linux >= 5bc8e8dbef27b73bd7b6d1fd5108b4fd4c6d469f <
    07e98a4d5e9c292eae97c9cc5ab0937384e48492
  - Linux 6.14
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:03.367'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90113'
references:
  - url: 'https://git.kernel.org/stable/c/07e98a4d5e9c292eae97c9cc5ab0937384e48492'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b8f32b0804b4bf0cba0ee0a093e3fd74f11d7166'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/db038ac4dca0fa626199e9c297eddd8362be0550'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.886Z'
epss: 0.00198
epssPercentile: 0.0984
---

## Overview

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

netdevsim: update queue NAPI association on queue reset

In netdevsim, receive queues (struct nsim_rq) embed their own struct
napi_struct. When queue reset is performed (e.g. via queue_reset
debugfs), nsim_queue_start() swaps in a newly allocated struct nsim_rq,
and nsim_queue_mem_free() later deletes and frees the old one.

However, nsim_queue_start() failed to update the queue-to-NAPI mapping
via netif_queue_set_napi(). As a result, dev->_rx[idx].napi continued to
point to the old NAPI struct. After the old queue was freed, a subsequent
queue dump via Netlink (NETDEV_CMD_QUEUE_GET) triggered a KASAN
slab-use-after-free read in nla_put_napi_id() when accessing
rxq->napi->napi_id.

Fix this by calling netif_queue_set_napi() in nsim_queue_start() to
associate the new NAPI with the RX queue, and clear the association
with netif_queue_set_napi(..., NULL) in nsim_del_napi() during teardown.

## Remediation

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