{
  "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-2026-80854",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80854",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T15:55:06.478Z",
    "updatedAt": "2026-10-19T08:44:48.320Z",
    "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": "usb: gadget: f_tcm: keep port count until LUN teardown completes",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: keep port count until LUN teardown completes\n\ntcm_usbg_drop_nexus() permits session removal once tpg_port_count\nreaches zero. However, usbg_port_unlink() currently decrements that\ncount from the fabric_pre_unlink() callback, before core_dev_del_lun()\nwaits for active se_lun references to drain.\n\nIf removal of the last LUN races a nexus removal, the latter can observe\na zero port count and call target_remove_session(). This frees\nsess_cmd_map while an in-flight struct usbg_cmd, including its work item,\ncan still be accessed.\n\nOverlapping the last-LUN unlink with nexus removal reproduces this\nlifetime violation as a DEBUG_OBJECTS \"free active\" warning for\nusbg_cmd_work, followed by a target-core BUG/Oops.\n\nThe generic target-core unlink path has no callback after\ncore_dev_del_lun() completes. Add an optional fabric_post_unlink()\ncallback and use it for the f_tcm port count. The count now remains\nnonzero until core_dev_del_lun() has finished draining active LUN\nreferences, preventing nexus removal from freeing the session during\ncommand completion.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c494c5562ca69b61a82f566e3b87a445d2c28929"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c1f359d9a5efed458946063de65ddbeaacc4f165"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "178f59a0bccd3f66cdfa5184310f31a58b7257c4"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ad6f0375d2e93a1d8c015463e5e92dfcb26e311b"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2efbfd42441d3ef8137aff2d59e9835e1d5ae780"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "85aa61fedcb4eb13f3dc5db73f6dc359f41f5d95"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bbd6aa311a9f4dd17822c7557451458d3d2e980b"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eaa96a8458f54d6cf0954242ab8b1df2a6fccafa"
            },
            {
              "version": "c52661d60f636d17e26ad834457db333bd1df494",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c39d0916da47d94909391876c9e5bd429ea7b1b9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "version": "5.10.269",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "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": "*"
            }
          ]
        }
      ]
    }
  }
}