{
  "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-2026-64594",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64594",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-06T07:13:50.309Z",
    "updatedAt": "2026-08-17T04:58:16.410Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "usb: gadget: f_fs: initialize reset_work at allocation time",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_fs: initialize reset_work at allocation time\n\nffs_fs_kill_sb() unconditionally calls cancel_work_sync() on\nffs->reset_work when a functionfs instance is unmounted:\n\n\tffs_data_reset(ffs);\n\tcancel_work_sync(&ffs->reset_work);\n\nHowever ffs->reset_work is only ever initialized via INIT_WORK() in\nffs_func_set_alt() and ffs_func_disable(), and only on the\nFFS_DEACTIVATED path. That state is reached solely by ffs_data_closed()\nwhen the instance is mounted with the \"no_disconnect\" option, so for the\ncommon case (no \"no_disconnect\", or mounted and unmounted without ever\nbeing deactivated) reset_work is never initialized.\n\nffs_data_new() allocates the ffs_data with kzalloc_obj() and does not\ninitialize reset_work, and ffs_data_reset()/ffs_data_clear() do not touch\nit either, so reset_work.func is left NULL. cancel_work_sync() on such a\nwork then trips the WARN_ON(!work->func) guard in __flush_work():\n\n  WARNING: kernel/workqueue.c:4301 at __flush_work+0x330/0x360, CPU#3: umount\n  Call trace:\n   __flush_work\n   cancel_work_sync\n   ffs_fs_kill_sb [usb_f_fs]\n   deactivate_locked_super\n   deactivate_super\n   cleanup_mnt\n   __cleanup_mnt\n   task_work_run\n   exit_to_user_mode_loop\n   el0_svc\n\nOn older kernels cancel_work_sync() on a zero-initialized work struct was\na silent no-op, which hid the missing initialization.\n\nInitialize reset_work once in ffs_data_new() so it is always valid for\nthe lifetime of the ffs_data, and drop the now-redundant INIT_WORK()\ncalls from the two deactivation paths.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7fe895e0a9651518c4fc082487da770ff9c14c7f"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0de6ebbabfbbc9c28350283dc97d8a519d5c6dd7"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cb19e54ebe9baf3c3243083ade65c937339ccb7b"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d5631081be07f20e764d3cb5c98ac0a1004fba51"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c36393b0d14e1e9783888f821ffe29381b8f46dc"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "69faa3779250df14f51d5084f938a99809546e52"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ba1867999dbc4085e6d8c52ac5266005b8b2bf07"
            },
            {
              "version": "18d6b32fca3841f7cd9479b4024abd8a9b299281",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3137b243c93982fe3460335e12f9247739766e10"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.0"
            },
            {
              "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": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}