cve-2024-35872
Vulnerability from cvelistv5
Published
2024-05-19 08:34
Modified
2024-11-05 09:24
Severity ?
Summary
mm/secretmem: fix GUP-fast succeeding on secretmem folios
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-35872",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-20T15:13:36.224766Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:34:09.055Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T03:21:48.571Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6564b014af92b677c1f07c44d7f5b595d589cf6e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9c2b4b657739ecda38e3b383354a29566955ac48"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/43fad1d0284de30159661d0badfc3cbaf7e6f8f8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/201e4aaf405dfd1308da54448654053004c579b5"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/65291dcfcf8936e1b23cfd7718fdfde7cfaf7706"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/secretmem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6564b014af92",
              "status": "affected",
              "version": "1507f51255c9",
              "versionType": "git"
            },
            {
              "lessThan": "9c2b4b657739",
              "status": "affected",
              "version": "1507f51255c9",
              "versionType": "git"
            },
            {
              "lessThan": "43fad1d0284d",
              "status": "affected",
              "version": "1507f51255c9",
              "versionType": "git"
            },
            {
              "lessThan": "201e4aaf405d",
              "status": "affected",
              "version": "1507f51255c9",
              "versionType": "git"
            },
            {
              "lessThan": "65291dcfcf89",
              "status": "affected",
              "version": "1507f51255c9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/secretmem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.85",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.26",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "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()-\u003efolio_add_lru().  The folio might be\nadded to the per-cpu folio batch and won\u0027t 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-05T09:24:13.973Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35872",
    "datePublished": "2024-05-19T08:34:30.096Z",
    "dateReserved": "2024-05-17T13:50:33.108Z",
    "dateUpdated": "2024-11-05T09:24:13.973Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35872\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T09:15:08.600\",\"lastModified\":\"2024-05-20T13:00:04.957\",\"vulnStatus\":\"Awaiting Analysis\",\"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()-\u003efolio_add_lru().  The folio might be\\nadded to the per-cpu folio batch and won\u0027t 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.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mm/secretmem: corrige el \u00e9xito r\u00e1pido de GUP en folios secretmem folio_is_secretmem() actualmente depende de que los folios secretmem sean folios LRU, para guardar algunos ciclos. Sin embargo, las publicaciones pueden residir en un lote de publicaciones sin el indicador LRU establecido o tener su indicador LRU borrado temporalmente. En consecuencia, la bandera LRU no es fiable para este fin. En particular, este es el caso cuando secretmem_fault() asigna una p\u00e1gina nueva y llama a filemap_add_folio()-\u0026gt;folio_add_lru(). La publicaci\u00f3n podr\u00eda agregarse al lote de publicaciones por CPU y no se establecer\u00e1 el indicador LRU hasta que el lote se drene usando, por ejemplo, lru_add_drain(). En consecuencia, es posible que folio_is_secretmem() no detecte folios secretmem y GUP-fast puede lograr capturar un folio secretmem, bloqueando el kernel cuando m\u00e1s tarde intentemos leer/escribir en el folio, porque el folio no se ha desasignado del mapa directo. Solucionarlo eliminando ese cheque poco confiable.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/201e4aaf405dfd1308da54448654053004c579b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/43fad1d0284de30159661d0badfc3cbaf7e6f8f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/65291dcfcf8936e1b23cfd7718fdfde7cfaf7706\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6564b014af92b677c1f07c44d7f5b595d589cf6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c2b4b657739ecda38e3b383354a29566955ac48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...

Loading...
  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.