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CVE-2026-80867— alpha/PCI: Add security_locked_down() check to pci_mmap_resource()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于pci_mmap_resource()函数在允许用户空间映射PCI BARs前未调用security_locked_down()进行安全检查，可能导致DMA攻击。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1537 · Transfer Data to Cloud Account

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux eb627e17727ebeede70697ae1798688b0d328b54< 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac affected
eb627e17727ebeede70697ae1798688b0d328b54< ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b affected
eb627e17727ebeede70697ae1798688b0d328b54< c3234efe21d4198945492cf7dba6859476f0f6ff affected
eb627e17727ebeede70697ae1798688b0d328b54< 4de5ff924c0a8ef8166c1a68af9087826e1e8d61 affected
eb627e17727ebeede70697ae1798688b0d328b54< 85f966b1120874fe530edec50d28373ceb06ebcd affected
eb627e17727ebeede70697ae1798688b0d328b54< 94defb18ac792fd16407d5a52ad0d3f5055c4b43 affected
eb627e17727ebeede70697ae1798688b0d328b54< 257b55dc3d18d7ef01f62a8ff7317871f7597e28 affected
eb627e17727ebeede70697ae1798688b0d328b54< 78a228f0aa0e9eba31955950c8a40a9945e2c8bb affected
… +10 more rows
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I. Basic Information for CVE-2026-80867

Vulnerability Information
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Vulnerability Title
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
Source: CVE Program / CVE List V5
Vulnerability 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().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于pci_mmap_resource()函数在允许用户空间映射PCI BARs前未调用security_locked_down()进行安全检查，可能导致DMA攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux eb627e17727ebeede70697ae1798688b0d328b54 ~ 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac -
Linux Linux 5.4 -

II. Public POCs for CVE-2026-80867

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III. Intelligence Information for CVE-2026-80867

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Patches & Fixes for CVE-2026-80867 (8)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page
CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80867

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