{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "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": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/virt/acrn/mm.c"
               ],
               "versions": [
                  {
                     "version": "b9c43aa0b18d",
                     "lessThan": "5c6705aa47b5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8a6e85f75a83",
                     "lessThan": "afeb0e696276",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8a6e85f75a83",
                     "lessThan": "e873f36ec890",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8a6e85f75a83",
                     "lessThan": "4c4ba3cf3a15",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8a6e85f75a83",
                     "lessThan": "2c8d6e24930b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8a6e85f75a83",
                     "lessThan": "3d6586008f7b",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/virt/acrn/mm.c"
               ],
               "versions": [
                  {
                     "version": "5.18",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.18",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.161",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.93",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.33",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.12",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9.3",
                     "lessThanOrEqual": "6.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/5c6705aa47b5b78d7ad36fea832bb69caa5bf49a"
            },
            {
               "url": "https://git.kernel.org/stable/c/afeb0e69627695f759fc73c39c1640dbf8649b32"
            },
            {
               "url": "https://git.kernel.org/stable/c/e873f36ec890bece26ecce850e969917bceebbb6"
            },
            {
               "url": "https://git.kernel.org/stable/c/4c4ba3cf3a15ccfbaf787d0296fa42cdb00da9b4"
            },
            {
               "url": "https://git.kernel.org/stable/c/2c8d6e24930b8ef7d4a81787627c559ae0e0d3bb"
            },
            {
               "url": "https://git.kernel.org/stable/c/3d6586008f7b638f91f3332602592caa8b00b559"
            }
         ],
         "title": "drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-38610",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}