---
id: CVE-2026-80867
title: 'alpha/PCI: Add security_locked_down() check to pci_mmap_resource()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  alpha/PCI: Add security_locked_down() check to pci_mmap_resource()

  Currently, Alpha's pci_mmap_resource() does not check
  security_locked_down(LOCKDOWN_PCI_ACCESS) befo…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    6e368485a1ac19fbde0a8b6a332d4545ae72a8ac
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    c3234efe21d4198945492cf7dba6859476f0f6ff
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    4de5ff924c0a8ef8166c1a68af9087826e1e8d61
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    85f966b1120874fe530edec50d28373ceb06ebcd
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    94defb18ac792fd16407d5a52ad0d3f5055c4b43
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    257b55dc3d18d7ef01f62a8ff7317871f7597e28
  - >-
    Linux >= eb627e17727ebeede70697ae1798688b0d328b54 <
    78a228f0aa0e9eba31955950c8a40a9945e2c8bb
  - Linux 5.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T17:03:55.498851Z'
published: '2026-09-04'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:55.246Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80867'
references:
  - url: 'https://git.kernel.org/stable/c/6e368485a1ac19fbde0a8b6a332d4545ae72a8ac'
  - url: 'https://git.kernel.org/stable/c/ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b'
  - url: 'https://git.kernel.org/stable/c/c3234efe21d4198945492cf7dba6859476f0f6ff'
  - url: 'https://git.kernel.org/stable/c/4de5ff924c0a8ef8166c1a68af9087826e1e8d61'
  - url: 'https://git.kernel.org/stable/c/85f966b1120874fe530edec50d28373ceb06ebcd'
  - url: 'https://git.kernel.org/stable/c/94defb18ac792fd16407d5a52ad0d3f5055c4b43'
  - url: 'https://git.kernel.org/stable/c/257b55dc3d18d7ef01f62a8ff7317871f7597e28'
  - url: 'https://git.kernel.org/stable/c/78a228f0aa0e9eba31955950c8a40a9945e2c8bb'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.12547
ingestedAt: '2026-11-06T18:00:12.531Z'
---

## Overview

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

alpha/PCI: Add security_locked_down() check to pci_mmap_resource()

Currently, Alpha's pci_mmap_resource() does not check
security_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap
PCI BARs.

The generic version has had this check since commit eb627e17727e ("PCI:
Lock down BAR access when the kernel is locked down") to prevent DMA
attacks when the kernel is locked down.

Add the same check to Alpha's pci_mmap_resource().

## Affected

- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < c3234efe21d4198945492cf7dba6859476f0f6ff`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 4de5ff924c0a8ef8166c1a68af9087826e1e8d61`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 85f966b1120874fe530edec50d28373ceb06ebcd`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 94defb18ac792fd16407d5a52ad0d3f5055c4b43`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 257b55dc3d18d7ef01f62a8ff7317871f7597e28`
- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 78a228f0aa0e9eba31955950c8a40a9945e2c8bb`
- `Linux 5.4`

## Remediation

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