---
id: CVE-2026-72329
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/liquidio: drop cached VF pci_dev LUT

  The PF SR-IOV enable path caches VF pci_dev pointers in
  dpiring_to_vfpcidev_lut[] by iterating with pci_get_device()
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/liquidio: drop cached VF pci_dev LUT

  The PF SR-IOV enable path caches VF pci_dev pointers in
  dpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those
  en…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ca6139ffc67ee6ef0459f81e37894ed411083855 <
    08ff33dce6f91510bb296a753a232db0ca3fd3d8
  - >-
    Linux >= ca6139ffc67ee6ef0459f81e37894ed411083855 <
    81acef3a247fd523513a2e9f71de1c167bc0f882
  - >-
    Linux >= ca6139ffc67ee6ef0459f81e37894ed411083855 <
    5c0e3ba4f500fd4314ceb42f07f16bc445156431
  - Linux 4.10
published: '2026-08-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:42.617'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72329'
references:
  - url: 'https://git.kernel.org/stable/c/08ff33dce6f91510bb296a753a232db0ca3fd3d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e3b20de8d7c06c8f1a0ded1e52be9d282609c3da'
  - url: 'https://git.kernel.org/stable/c/1cf5c6a80adc31456f3e93b2922a2446fd63e2c4'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72329.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72329'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516301'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72329'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72329'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-72329'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081508-CVE-2026-72329-c884@gregkh/T
  - url: 'https://access.redhat.com/errata/RHSA-2026:74133'
  - url: 'https://access.redhat.com/errata/RHSA-2026:74132'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00193
epssPercentile: 0.0891
ingestedAt: '2026-10-15T11:00:41.685Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:47:03.690749Z'
patched:
  - enterprise_linux_baseos_v_8
  - enterprise_linux_crb_v_8
  - enterprise_linux_nfv_v_8
  - enterprise_linux_rt_v_8
cwe:
  - CWE-416
scores:
  nvd: 9.3
  vendor: 4.7
---

## Overview

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

net/liquidio: drop cached VF pci_dev LUT

The PF SR-IOV enable path caches VF pci_dev pointers in
dpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those
entries do not own a reference, because the iterator drops the previous
device reference on each step. The cached pointer is then dereferenced
later when handling OCTEON_VF_FLR_REQUEST.

Replace the cached VF mapping with runtime lookup on the mailbox DPI
ring: derive the VF index from q_no, resolve the VF via exported PCI
IOV helpers, validate it with the PF pointer and VF ID, then issue
pcie_flr() and drop the reference with pci_dev_put(). Remove the
unused VF lookup table initialization and cleanup.

## Remediation

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

## Vendor advisories

- **RHSA-2026:74133** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:74133)
- **RHSA-2026:74132** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:74132)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 7 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72329.json)