{
  "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-2026-80856",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80856",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T15:55:09.250Z",
    "updatedAt": "2026-10-19T08:44:50.272Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "fuse: fix invalidate lock leak on setattr writeback failure",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on setattr writeback failure\n\nfuse_do_setattr() takes filemap_invalidate_lock() for a DAX truncate\n(fault_blocked = true) and releases it at the out:/error: labels.  But\nwhen a writeback flush is also needed, a write_inode_now() failure\nreturns directly and leaks the lock, so any later fault or truncate on\nthe file stalls on the stale rwsem.\n\nFor example, truncate(2) on a setuid file reaches fuse_do_setattr()\nwith both ATTR_SIZE and ATTR_MODE set:\n\n  truncate(2)\n  └─ do_truncate()\n     ├─ dentry_needs_remove_privs()         # S_ISUID\n     └─ notify_change()                     # KILL_SUID -> ATTR_MODE\n        └─ fuse_setattr()                   # no killpriv:\n           │                                #   ia_valid |= ATTR_MODE\n           └─ fuse_do_setattr()\n              ├─ filemap_invalidate_lock()  # IS_DAX && is_truncate\n              └─ write_inode_now()          # is_wb && ATTR_MODE\n                 └─ if (err)                # e.g. daemon -> -EIO\n                    return err              # <- lock leaked\n\nFix this by adding an unlock label that releases the lock before\nreturning the error, and use it for the fuse_dax_break_layouts()\nfailure path as well.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8f14906ce9103ab8f2f1ebda45935a0d61b9d763"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03cfeeb135428fa83f0791d3f8f94d9298cae695"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "92588d187ba4697a322e7aefe5d9e538a87d1cd2"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea9fea370b8de4ffd72e0ef89550415c15637787"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1758730d9eaa3c06cf415c3446d9f6eed9ed3eed"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dd278d954c0e96a9cbd3cc491e07b8267d25f8d5"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8457ebfd77a46e8d1210e8888ea914ad064558e"
            },
            {
              "version": "6ae330cad6ef22ab8347ea9e0707dc56a7c7363f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9afeca0d569c9fc89d758fe7a9339d1e8afb1546"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.10"
            },
            {
              "version": "5.15.220",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.187",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.156",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.108",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.49",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}