{
  "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-2026-90140",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90140",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:06:37.824Z",
    "updatedAt": "2026-10-19T08:58:38.281Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "cuse: wait for pending RCU callbacks on module exit",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncuse: wait for pending RCU callbacks on module exit\n\nSince commit 053fc4f755ad (\"fuse: fix UAF in rcu pathwalks\"),\nfuse_conn_put() frees the fuse_conn through call_rcu() rather than\nsynchronously.  For cuse, fc->release is cuse_fc_release(), which\nlives in the cuse module.  If the module is removed before the RCU\ngrace period ends, the callback jumps into freed module memory:\n\n      userspace / module unload      |        RCU softirq\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n close(/dev/cuse)                    |\n  cuse_channel_release()             |\n   fuse_dev_release()                |\n    fuse_conn_put(fch->conn)         |\n     call_rcu(delayed_release) ------+---> callback queued\n                                     |\n rmmod cuse                          |\n  cuse_exit()                        |\n   cuse_channel_destroy()            |\n   ...                               |\n   return                            |\n                                     |\n <module text freed>                 |\n                                     |  rcu_do_batch()\n                                     |   delayed_release()\n                                     |    fc->release()\n                                     |     -> cuse_fc_release()\n                                     |        ^^^ freed text!\n\nThe freed module text is unmapped by vfree(), so the jump into the\nstale callback triggers a page-fault Oops.  If the virtual address\nis subsequently reused, the callback could execute unrelated code\n(undefined behaviour).\n\nFix this by calling rcu_barrier() in cuse_exit() so that any pending\nfuse_conn release callback completes before the module is removed.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bfbab62ca69f72bcd14ea30de1fb98f6080ad464",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7fe415e1cd8fa875be263670c0ab47109818abb6"
            },
            {
              "version": "a8f650b93e55764ca9ff8e1ddebc151f57024086",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45ae914b2f6ea56fc2f1c017fdee4e995bcb4c0e"
            },
            {
              "version": "535e9bd0e8f8d8cfdc29de7cdb902b5041427fe6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ac5c499413385cea3e0220d6050408d50842891d"
            },
            {
              "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a1b46aee33d83f14ed62d7fdef1a91d3e0b732a9"
            },
            {
              "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "389bd349ddbcf90dbd8a4f2a4ab6e552d53df134"
            },
            {
              "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c40f3f24839f8404325a2099e26c2a04786ae309"
            },
            {
              "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4deb3edead0c0e172cc7349e8855d741d3c5e162"
            },
            {
              "version": "5.15.166",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.221"
            },
            {
              "version": "6.1.107",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.188"
            },
            {
              "version": "6.6.48",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.157"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.8"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}