{
  "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-2026-93798",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93798",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-24T16:02:31.291Z",
    "updatedAt": "2026-10-03T10:57:32.550Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "btrfs: fix reloc root cleanup in merge_reloc_roots()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix reloc root cleanup in merge_reloc_roots()\n\nIf the root we got has zero root refs in its root item, we are resetting\nthe root's ->reloc_root without using barriers like we do everywhere else.\nSashiko complained about this while reviewing another patch, and it's\ncorrect (see the Link tag below).\n\nAlso, we should not clear BTRFS_ROOT_DEAD_RELOC_TREE from the root unless\nthe root points to the reloc root we have.\n\nFix this by using clear_reloc_root(), which issues the memory barrier\nafter setting the root's ->reloc_root to NULL and before clearing the bit\nBTRFS_ROOT_DEAD_RELOC_TREE from the root.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "29531470b1bf1e8bd2df4941fe913106edbca615"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "415f8665a969d3c906e4fd7c90fcbb4b357886f6"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ee695a968aa73b1e67ccbf2133dc0e54381d32b2"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0bc25f0a2d1b3e0a691431c4d7aef36afcd527c5"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ab48583aa9948205ff9a6470e23dbff74c565e24"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "63d6b1f04cd91c825329712aa526215ffa5d11ca"
            },
            {
              "version": "1dae7e0e58b484eaa43d530f211098fdeeb0f404",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b78fe9563e2d5ae47805f1e5dc722c91fd30e1f8"
            },
            {
              "version": "ee08663380ffd5a45a1c87580fbc305e8413c235",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "33823378ff2b510fd7b566f25bb18438aeb9b23b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.4.54",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.7.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.10.271",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.222",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}