CVE-2023-54317 (GCVE-0-2023-54317)
Vulnerability from cvelistv5
Published
2025-12-30 12:23
Modified
2025-12-30 12:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: dm flakey: don't corrupt the zero page When we need to zero some range on a block device, the function __blkdev_issue_zero_pages submits a write bio with the bio vector pointing to the zero page. If we use dm-flakey with corrupt bio writes option, it will corrupt the content of the zero page which results in crashes of various userspace programs. Glibc assumes that memory returned by mmap is zeroed and it uses it for calloc implementation; if the newly mapped memory is not zeroed, calloc will return non-zeroed memory. Fix this bug by testing if the page is equal to ZERO_PAGE(0) and avoiding the corruption in this case.
References
Impacted products
Vendor Product Version
Linux Linux Version: c6cd92fcabd6cc78bb1808c6a18245c842722fc1
Version: d4c637af2e56ee1ec66ee34d0ac5a13c75911aec
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: a00f5276e26636cbf72f24f79831026d2e2868e7
Version: 1ed7c9f45fb893877ffa7cedd7aa61beaadbb328
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{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm flakey: don\u0027t corrupt the zero page\n\nWhen we need to zero some range on a block device, the function\n__blkdev_issue_zero_pages submits a write bio with the bio vector pointing\nto the zero page. If we use dm-flakey with corrupt bio writes option, it\nwill corrupt the content of the zero page which results in crashes of\nvarious userspace programs. Glibc assumes that memory returned by mmap is\nzeroed and it uses it for calloc implementation; if the newly mapped\nmemory is not zeroed, calloc will return non-zeroed memory.\n\nFix this bug by testing if the page is equal to ZERO_PAGE(0) and\navoiding the corruption in this case."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:23:47.232Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "cveId": "CVE-2023-54317",
    "datePublished": "2025-12-30T12:23:47.232Z",
    "dateReserved": "2025-12-30T12:06:44.531Z",
    "dateUpdated": "2025-12-30T12:23:47.232Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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  }
}


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