CVE-2026-80867

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

Published Sep 4, 2026 CVSS n/a EPSS < 1% KEV · Not listed

Description

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< c3234efe21d4198945492cf7dba6859476f0f6ff
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 4de5ff924c0a8ef8166c1a68af9087826e1e8d61
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 85f966b1120874fe530edec50d28373ceb06ebcd
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 94defb18ac792fd16407d5a52ad0d3f5055c4b43
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 257b55dc3d18d7ef01f62a8ff7317871f7597e28
`eb627e17727ebeede70697ae1798688b0d328b54`	affected	< 78a228f0aa0e9eba31955950c8a40a9945e2c8bb

Linux

affected

Version	Status	Constraints
`5.4`	affected	—
`0`	unaffected	< 5.4
`5.10.261`	unaffected	≤ 5.10.*
`5.15.212`	unaffected	≤ 5.15.*
`6.1.178`	unaffected	≤ 6.1.*
`6.6.145`	unaffected	≤ 6.6.*
`6.12.97`	unaffected	≤ 6.12.*
`6.18.40`	unaffected	≤ 6.18.*
`7.1.5`	unaffected	≤ 7.1.*
`7.2`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[eb627e17727ebeede70697ae1798688b0d328b54,6e368485a1ac19fbde0a8b6a332d4545ae72a8ac)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,c3234efe21d4198945492cf7dba6859476f0f6ff)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,4de5ff924c0a8ef8166c1a68af9087826e1e8d61)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,85f966b1120874fe530edec50d28373ceb06ebcd)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,94defb18ac792fd16407d5a52ad0d3f5055c4b43)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,257b55dc3d18d7ef01f62a8ff7317871f7597e28)`	affected	code_commit	—
`[eb627e17727ebeede70697ae1798688b0d328b54,78a228f0aa0e9eba31955950c8a40a9945e2c8bb)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`5.4`	affected	generic	—
`[0,5.4)`	unaffected	generic	—
`[5.10.261,5.10.*]`	unaffected	generic	—
`[5.15.212,5.15.*]`	unaffected	generic	—
`[6.1.178,6.1.*]`	unaffected	generic	—
`[6.6.145,6.6.*]`	unaffected	generic	—
`[6.12.97,6.12.*]`	unaffected	generic	—
`[6.18.40,6.18.*]`	unaffected	generic	—
`[7.1.5,7.1.*]`	unaffected	generic	—
`[7.2,*]`	unaffected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Ubuntu USN	USN-8875-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8877-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8878-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8879-1	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8887-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8888-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8889-1	Linux kernel (OEM) vulnerabilities
Ubuntu USN	USN-8887-2	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8888-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8875-2	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8887-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8917-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8918-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9003-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9043-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-9091-1	Linux kernel (NVIDIA Tegra) vulnerabilities

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.220% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/257b55dc3d18d7ef01f62a8ff7317871f7597e28
https://git.kernel.org/stable/c/4de5ff924c0a8ef8166c1a68af9087826e1e8d61
https://git.kernel.org/stable/c/6e368485a1ac19fbde0a8b6a332d4545ae72a8ac
https://git.kernel.org/stable/c/78a228f0aa0e9eba31955950c8a40a9945e2c8bb
https://git.kernel.org/stable/c/85f966b1120874fe530edec50d28373ceb06ebcd
https://git.kernel.org/stable/c/94defb18ac792fd16407d5a52ad0d3f5055c4b43
https://git.kernel.org/stable/c/c3234efe21d4198945492cf7dba6859476f0f6ff
https://git.kernel.org/stable/c/ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b

History

Nov 7, 2026 7:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 4, 2026 8:15 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-269 CWE-285

Sep 4, 2026 5:00 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
Description		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().
Title		alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/257b55dc3d18d7ef01f62a8ff7317871f7597e28 https://git.kernel.org/stable/c/4de5ff924c0a8ef8166c1a68af9087826e1e8d61 https://git.kernel.org/stable/c/6e368485a1ac19fbde0a8b6a332d4545ae72a8ac https://git.kernel.org/stable/c/78a228f0aa0e9eba31955950c8a40a9945e2c8bb https://git.kernel.org/stable/c/85f966b1120874fe530edec50d28373ceb06ebcd https://git.kernel.org/stable/c/94defb18ac792fd16407d5a52ad0d3f5055c4b43 https://git.kernel.org/stable/c/c3234efe21d4198945492cf7dba6859476f0f6ff https://git.kernel.org/stable/c/ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b