cve-2024-40900
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2024-11-05 09:32
Severity ?
Summary
cachefiles: remove requests from xarray during flushing requests
Impacted products
Vendor Product Version
Linux Linux Version: 5.19
Show details on NVD website


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            "url": "https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013"
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        "title": "CVE Program Container"
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-40900",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:06:34.508297Z",
                "version": "2.0.3"
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cachefiles/daemon.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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          "vendor": "Linux",
          "versions": [
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              "version": "5.19"
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              "lessThan": "5.19",
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              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.95",
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              "version": "6.6.35",
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              "lessThanOrEqual": "6.9.*",
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              "version": "6.9.6",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: remove requests from xarray during flushing requests\n\nEven with CACHEFILES_DEAD set, we can still read the requests, so in the\nfollowing concurrency the request may be used after it has been freed:\n\n     mount  |   daemon_thread1    |    daemon_thread2\n------------------------------------------------------------\n cachefiles_ondemand_init_object\n  cachefiles_ondemand_send_req\n   REQ_A = kzalloc(sizeof(*req) + data_len)\n   wait_for_completion(\u0026REQ_A-\u003edone)\n            cachefiles_daemon_read\n             cachefiles_ondemand_daemon_read\n                                  // close dev fd\n                                  cachefiles_flush_reqs\n                                   complete(\u0026REQ_A-\u003edone)\n   kfree(REQ_A)\n              xa_lock(\u0026cache-\u003ereqs);\n              cachefiles_ondemand_select_req\n                req-\u003emsg.opcode != CACHEFILES_OP_READ\n                // req use-after-free !!!\n              xa_unlock(\u0026cache-\u003ereqs);\n                                   xa_destroy(\u0026cache-\u003ereqs)\n\nHence remove requests from cache-\u003ereqs when flushing them to avoid\naccessing freed requests."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-05T09:32:44.519Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "cachefiles: remove requests from xarray during flushing requests",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40900",
    "datePublished": "2024-07-12T12:20:42.192Z",
    "dateReserved": "2024-07-12T12:17:45.579Z",
    "dateUpdated": "2024-11-05T09:32:44.519Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-40900\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-12T13:15:13.433\",\"lastModified\":\"2024-11-21T09:31:49.010\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncachefiles: remove requests from xarray during flushing requests\\n\\nEven with CACHEFILES_DEAD set, we can still read the requests, so in the\\nfollowing concurrency the request may be used after it has been freed:\\n\\n     mount  |   daemon_thread1    |    daemon_thread2\\n------------------------------------------------------------\\n cachefiles_ondemand_init_object\\n  cachefiles_ondemand_send_req\\n   REQ_A = kzalloc(sizeof(*req) + data_len)\\n   wait_for_completion(\u0026REQ_A-\u003edone)\\n            cachefiles_daemon_read\\n             cachefiles_ondemand_daemon_read\\n                                  // close dev fd\\n                                  cachefiles_flush_reqs\\n                                   complete(\u0026REQ_A-\u003edone)\\n   kfree(REQ_A)\\n              xa_lock(\u0026cache-\u003ereqs);\\n              cachefiles_ondemand_select_req\\n                req-\u003emsg.opcode != CACHEFILES_OP_READ\\n                // req use-after-free !!!\\n              xa_unlock(\u0026cache-\u003ereqs);\\n                                   xa_destroy(\u0026cache-\u003ereqs)\\n\\nHence remove requests from cache-\u003ereqs when flushing them to avoid\\naccessing freed requests.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cachefiles: elimina solicitudes de xarray durante las solicitudes de vaciado Incluso con CACHEFILES_DEAD configurado, a\u00fan podemos leer las solicitudes, por lo que en la siguiente concurrencia la solicitud se puede usar despu\u00e9s de que se haya liberado: mount | daemon_thread1 | daemon_thread2 ------------------------------------------------- --------- Cachefiles_ondemand_init_object Cachefiles_ondemand_send_req req_a = kzalloc (sizeof (*req) + data_len) Wait_for_completion (\u0026amp; req_a-\u0026gt; ded) gratis (req_a ) xa_lock(\u0026amp;cache-\u0026gt;reqs); cachefiles_ondemand_select_req req-\u0026gt;msg.opcode != CACHEFILES_OP_READ // \u00a1\u00a1\u00a1requiere use-after-free !!! xa_unlock(\u0026amp;cache-\u0026gt;reqs); xa_destroy(\u0026amp;cache-\u0026gt;reqs) Por lo tanto, elimine las solicitudes de cache-\u0026gt;reqs cuando las vac\u00ede para evitar acceder a las solicitudes liberadas.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/37e19cf86a520d65de1de9cb330415c332a40d19\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50d0e55356ba5b84ffb51c42704126124257e598\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/37e19cf86a520d65de1de9cb330415c332a40d19\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/50d0e55356ba5b84ffb51c42704126124257e598\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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}


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