What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-04

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

• Linux kernel: 5.4 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

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

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