{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-53393",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53393",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T12:01:56.684Z",
    "updatedAt": "2026-08-17T04:50:44.847Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "nfsd: reset write verifier on deferred writeback errors",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: reset write verifier on deferred writeback errors\n\nnfsd_vfs_write() and nfsd_commit() both call filemap_check_wb_err() to\ndetect deferred writeback errors, but neither rotates the server's write\nverifier (nn->writeverf) when this check fails. Every other\ndurable-storage-failure path in these functions calls\ncommit_reset_write_verifier() before returning an error.\n\nThe missing rotation means clients holding UNSTABLE write data under the\ncurrent verifier will COMMIT, receive the unchanged verifier back, and\nconclude their data is durable — silently dropping data that failed\nwriteback. This violates the UNSTABLE+COMMIT durability contract\n(RFC 1813 §3.3.7, RFC 8881 §18.32).\n\nAdd commit_reset_write_verifier() calls at both filemap_check_wb_err()\nerror sites, matching the pattern used by adjacent error paths in the\nsame functions. The helper already filters -EAGAIN and -ESTALE\ninternally, so the calls are unconditionally safe.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f14816f2f928c560d28ba344af689f56efcd6f55",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b8e5894e56cff70fa245628fe16f0ad6367f8090"
            },
            {
              "version": "3145fe0ebb16e1715ad541a301bc6675c8375fcd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bc2baca02ec56da7707a74ed5d340b0a1dff1841"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "43b65d2997963e80e8d8d86520bcb1e0751227de"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "666e837b247fcadf2d8d508b9b0e49d720393eb4"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4367afc119c51e17a616f6908772b7e2c2c4013f"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b027cca33c97354149fcc0ddeede4525c41093cd"
            },
            {
              "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2090b05803faab8a9fa62fbff871007862cac1b7"
            },
            {
              "version": "5.10.124",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.261"
            },
            {
              "version": "5.15.49",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.212"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.17"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.95",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}