---
id: CVE-2026-23166
title: 'ice: Fix NULL pointer dereference in ice_vsi_set_napi_queues'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ice: Fix NULL pointer dereference in ice_vsi_set_napi_queues

  Add NULL pointer checks in ice_vsi_set_napi_queues() to prevent crashes
  during resume from suspend when ri…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd <
    d75c7b7c3c2b8e3569043099e6bdcefc983856c5
  - >-
    Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd <
    36126ddbe924727add05a594dedf230d3b575e4d
  - >-
    Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd <
    9bb30be4d89ff9a8d7ab1aa0eb2edaca83431f85
  - Linux 2285c2faef19ee08a6bd6754f4c3ec07dceb2889
  - Linux >= 6.10.10 < 6.11
  - Linux 6.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:21:21.648922Z'
published: '2026-02-14'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:23:20.561Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-23166'
references:
  - url: 'https://git.kernel.org/stable/c/d75c7b7c3c2b8e3569043099e6bdcefc983856c5'
  - url: 'https://git.kernel.org/stable/c/36126ddbe924727add05a594dedf230d3b575e4d'
  - url: 'https://git.kernel.org/stable/c/9bb30be4d89ff9a8d7ab1aa0eb2edaca83431f85'
tags:
  - cve.org
epss: 0.00132
epssPercentile: 0.02802
ingestedAt: '2026-11-05T22:38:32.083Z'
---

## Overview

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

ice: Fix NULL pointer dereference in ice_vsi_set_napi_queues

Add NULL pointer checks in ice_vsi_set_napi_queues() to prevent crashes
during resume from suspend when rings[q_idx]->q_vector is NULL.

Tested adaptor:
60:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller E810-XXV for SFP [8086:159b] (rev 02)
        Subsystem: Intel Corporation Ethernet Network Adapter E810-XXV-2 [8086:4003]

SR-IOV state: both disabled and enabled can reproduce this issue.

kernel version: v6.18

Reproduce steps:
Boot up and execute suspend like systemctl suspend or rtcwake.

Log:
<1>[  231.443607] BUG: kernel NULL pointer dereference, address: 0000000000000040
<1>[  231.444052] #PF: supervisor read access in kernel mode
<1>[  231.444484] #PF: error_code(0x0000) - not-present page
<6>[  231.444913] PGD 0 P4D 0
<4>[  231.445342] Oops: Oops: 0000 [#1] SMP NOPTI
<4>[  231.446635] RIP: 0010:netif_queue_set_napi+0xa/0x170
<4>[  231.447067] Code: 31 f6 31 ff c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 48 85 c9 74 0b <48> 83 79 30 00 0f 84 39 01 00 00 55 41 89 d1 49 89 f8 89 f2 48 89
<4>[  231.447513] RSP: 0018:ffffcc780fc078c0 EFLAGS: 00010202
<4>[  231.447961] RAX: ffff8b848ca30400 RBX: ffff8b848caf2028 RCX: 0000000000000010
<4>[  231.448443] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8b848dbd4000
<4>[  231.448896] RBP: ffffcc780fc078e8 R08: 0000000000000000 R09: 0000000000000000
<4>[  231.449345] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
<4>[  231.449817] R13: ffff8b848dbd4000 R14: ffff8b84833390c8 R15: 0000000000000000
<4>[  231.450265] FS:  00007c7b29e9d740(0000) GS:ffff8b8c068e2000(0000) knlGS:0000000000000000
<4>[  231.450715] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  231.451179] CR2: 0000000000000040 CR3: 000000030626f004 CR4: 0000000000f72ef0
<4>[  231.451629] PKRU: 55555554
<4>[  231.452076] Call Trace:
<4>[  231.452549]  <TASK>
<4>[  231.452996]  ? ice_vsi_set_napi_queues+0x4d/0x110 [ice]
<4>[  231.453482]  ice_resume+0xfd/0x220 [ice]
<4>[  231.453977]  ? __pfx_pci_pm_resume+0x10/0x10
<4>[  231.454425]  pci_pm_resume+0x8c/0x140
<4>[  231.454872]  ? __pfx_pci_pm_resume+0x10/0x10
<4>[  231.455347]  dpm_run_callback+0x5f/0x160
<4>[  231.455796]  ? dpm_wait_for_superior+0x107/0x170
<4>[  231.456244]  device_resume+0x177/0x270
<4>[  231.456708]  dpm_resume+0x209/0x2f0
<4>[  231.457151]  dpm_resume_end+0x15/0x30
<4>[  231.457596]  suspend_devices_and_enter+0x1da/0x2b0
<4>[  231.458054]  enter_state+0x10e/0x570

Add defensive checks for both the ring pointer and its q_vector
before dereferencing, allowing the system to resume successfully even when
q_vectors are unmapped.

## Affected

- `Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd < d75c7b7c3c2b8e3569043099e6bdcefc983856c5`
- `Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd < 36126ddbe924727add05a594dedf230d3b575e4d`
- `Linux >= 2a5dc090b92cfa5270e20056074241c6db5c9cdd < 9bb30be4d89ff9a8d7ab1aa0eb2edaca83431f85`
- `Linux 2285c2faef19ee08a6bd6754f4c3ec07dceb2889`
- `Linux >= 6.10.10 < 6.11`
- `Linux 6.11`

## Remediation

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