cve-2021-47461
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-11-04 12:06
Severity ?
Summary
userfaultfd: fix a race between writeprotect and exit_mmap()
Impacted products
Vendor Product Version
Linux Linux Version: 5.7
Show details on NVD website


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                "id": "CVE-2021-47461",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T18:15:05.306200Z",
                "version": "2.0.3"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuserfaultfd: fix a race between writeprotect and exit_mmap()\n\nA race is possible when a process exits, its VMAs are removed by\nexit_mmap() and at the same time userfaultfd_writeprotect() is called.\n\nThe race was detected by KASAN on a development kernel, but it appears\nto be possible on vanilla kernels as well.\n\nUse mmget_not_zero() to prevent the race as done in other userfaultfd\noperations."
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      "title": "userfaultfd: fix a race between writeprotect and exit_mmap()",
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    "cveId": "CVE-2021-47461",
    "datePublished": "2024-05-22T06:23:22.373Z",
    "dateReserved": "2024-05-22T06:20:56.197Z",
    "dateUpdated": "2024-11-04T12:06:23.637Z",
    "state": "PUBLISHED"
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