CVE-2026-80867 (GCVE-0-2026-80867)
Vulnerability from cvelistv5
Published
2026-09-04 16:48
Modified
2026-09-04 16:48
Severity ?
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) 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().
References
Impacted products
Vendor Product Version
Linux Linux Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
Version: eb627e17727ebeede70697ae1798688b0d328b54
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/alpha/kernel/pci-sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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\u0027s pci_mmap_resource()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T16:48:15.723Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "alpha/PCI: Add security_locked_down() check to pci_mmap_resource()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80867",
    "datePublished": "2026-09-04T16:48:15.723Z",
    "dateReserved": "2026-08-26T14:34:25.798Z",
    "dateUpdated": "2026-09-04T16:48:15.723Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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