{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-38610",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-38610"
  ],
  "published": "2024-06-19T13:56:33Z",
  "summary": "drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()\n\nPatch series \"mm: follow_pte() improvements and acrn follow_pte() fixes\".\n\nPatch #1 fixes a bunch of issues I spotted in the acrn driver.  It\ncompiles, that's all I know.  I'll appreciate some review and testing from\nacrn folks.\n\nPatch #2+#3 improve follow_pte(), passing a VMA instead of the MM, adding\nmore sanity checks, and improving the documentation.  Gave it a quick test\non x86-64 using VM_PAT that ends up using follow_pte().\n\n\nThis patch (of 3):\n\nWe currently miss handling various cases, resulting in a dangerous\nfollow_pte() (previously follow_pfn()) usage.\n\n(1) We're not checking PTE write permissions.\n\nMaybe we should simply always require pte_write() like we do for\npin_user_pages_fast(FOLL_WRITE)? Hard to tell, so let's check for\nACRN_MEM_ACCESS_WRITE for now.\n\n(2) We're not rejecting refcounted pages.\n\nAs we are not using MMU notifiers, messing with refcounted pages is\ndangerous and can result in use-after-free. Let's make sure to reject them.\n\n(3) We are only looking at the first PTE of a bigger range.\n\nWe only lookup a single PTE, but memmap->len may span a larger area.\nLet's loop over all involved PTEs and make sure the PFN range is\nactually contiguous. Reject everything else: it couldn't have worked\neither way, and rather made use access PFNs we shouldn't be accessing.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.93",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38610"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c6705aa47b5b78d7ad36fea832bb69caa5bf49a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/afeb0e69627695f759fc73c39c1640dbf8649b32"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e873f36ec890bece26ecce850e969917bceebbb6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4c4ba3cf3a15ccfbaf787d0296fa42cdb00da9b4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2c8d6e24930b8ef7d4a81787627c559ae0e0d3bb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3d6586008f7b638f91f3332602592caa8b00b559"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}