{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/secretmem: fix GUP-fast succeeding on secretmem folios\n\nfolio_is_secretmem() currently relies on secretmem folios being LRU\nfolios, to save some cycles.\n\nHowever, folios might reside in a folio batch without the LRU flag set, or\ntemporarily have their LRU flag cleared.  Consequently, the LRU flag is\nunreliable for this purpose.\n\nIn particular, this is the case when secretmem_fault() allocates a fresh\npage and calls filemap_add_folio()->folio_add_lru().  The folio might be\nadded to the per-cpu folio batch and won't get the LRU flag set until the\nbatch was drained using e.g., lru_add_drain().\n\nConsequently, folio_is_secretmem() might not detect secretmem folios and\nGUP-fast can succeed in grabbing a secretmem folio, crashing the kernel\nwhen we would later try reading/writing to the folio, because the folio\nhas been unmapped from the directmap.\n\nFix it by removing that unreliable check."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/linux/secretmem.h"
               ],
               "versions": [
                  {
                     "version": "1507f51255c9",
                     "lessThan": "6564b014af92",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1507f51255c9",
                     "lessThan": "9c2b4b657739",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1507f51255c9",
                     "lessThan": "43fad1d0284d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1507f51255c9",
                     "lessThan": "201e4aaf405d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1507f51255c9",
                     "lessThan": "65291dcfcf89",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/linux/secretmem.h"
               ],
               "versions": [
                  {
                     "version": "5.14",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.14",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.154",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.85",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.26",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.5",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/6564b014af92b677c1f07c44d7f5b595d589cf6e"
            },
            {
               "url": "https://git.kernel.org/stable/c/9c2b4b657739ecda38e3b383354a29566955ac48"
            },
            {
               "url": "https://git.kernel.org/stable/c/43fad1d0284de30159661d0badfc3cbaf7e6f8f8"
            },
            {
               "url": "https://git.kernel.org/stable/c/201e4aaf405dfd1308da54448654053004c579b5"
            },
            {
               "url": "https://git.kernel.org/stable/c/65291dcfcf8936e1b23cfd7718fdfde7cfaf7706"
            }
         ],
         "title": "mm/secretmem: fix GUP-fast succeeding on secretmem folios",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-35872",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}