{"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:\n\nalpha/PCI: Add security_locked_down() check to pci_mmap_resource()\n\nCurrently, Alpha's pci_mmap_resource() does not check\nsecurity_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","slug":"CVE-2026-80867","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nalpha/PCI: Add security_locked_down() check to pci_mmap_resource()\n\nCurrently, Alpha's pci_mmap_resource() does not check\nsecurity_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap\nPCI BARs.\n\nThe generic version has had this check since commit eb627e17727e (\"PCI:\nLock down BAR access when the kernel is locked down\") to prevent DMA\nattacks when the kernel is locked down.\n\nAdd the same check to Alpha's pci_mmap_resource().\n\n## Affected\n\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < c3234efe21d4198945492cf7dba6859476f0f6ff`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 4de5ff924c0a8ef8166c1a68af9087826e1e8d61`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 85f966b1120874fe530edec50d28373ceb06ebcd`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 94defb18ac792fd16407d5a52ad0d3f5055c4b43`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 257b55dc3d18d7ef01f62a8ff7317871f7597e28`\n- `Linux >= eb627e17727ebeede70697ae1798688b0d328b54 < 78a228f0aa0e9eba31955950c8a40a9945e2c8bb`\n- `Linux 5.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}