{
  "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-2026-98773",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98773",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-18T15:48:09.093Z",
    "updatedAt": "2026-10-21T12:56:48.532Z",
    "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": "USB: cdc-acm: skip URB restart in port_shutdown if disconnected",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: cdc-acm: skip URB restart in port_shutdown if disconnected\n\nacm_port_shutdown() is called from the tty-port machinery whenever the\nlast user closes the port.  acm_disconnect() sets acm->disconnected and\ncalls tty_port_tty_vhangup(), which eventually triggers port_shutdown().\nAt that point acm_disconnect() has already called acm_poison_urbs() and\nis about to free the control and read URBs.\n\nHowever, acm_port_shutdown() unconditionally calls acm_unpoison_urbs()\nand, when the ALWAYS_POLL_CTRL quirk is set, immediately re-submits the\nctrlurb and all read URBs.  If the concurrent acm_disconnect() then\nfrees those URBs and their DMA buffers while they are in-flight, the\nresult is a use-after-free in acm_ctrl_irq() or acm_read_bulk_callback()\naccessing the freed DMA memory.\n\nFix by checking acm->disconnected after draining the delayed anchor and\nreturning early: if we are in a disconnect path the URBs must remain\npoisoned and must not be resubmitted.\n\nThe early return is placed after the delayed-anchor drain loop because\nthat loop only cancels write-side accounting (wb->use = false and\nautopm counter) and does not touch the hardware path.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8fb82e3555a7d56a05d8ef0edee9859f889c0860",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d86775e79838d7d2e38ccf506a7d0f8e2dd4d5d0"
            },
            {
              "version": "603d5a7110832e10165d21f9a1486399457177de",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9742905d9ed5bf23ebe4c100dec80b6bc50fb522"
            },
            {
              "version": "5d29d7ff8679e5a525f22da467ba33c042e8029b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a0ed07b5bbb2d8fcef86810453216070691816e7"
            },
            {
              "version": "f58752ebcb35e156c85cd1a82d6579c7af3b9023",
              "status": "affected",
              "versionType": "git",
              "lessThan": "420ca35af891d33522cc08504768ccd60a4c450a"
            },
            {
              "version": "f58752ebcb35e156c85cd1a82d6579c7af3b9023",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc614d6bc991740d41d5a99ac7765c4b675dda88"
            },
            {
              "version": "d826061aa64cb28089bf4c73e301dd7928662b84",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "283f8162cc3c82086537cbc7dc01870dbeb07a91",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "f77f10bc76c2da86b4248269472f6d971e37828b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.6.136",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.160"
            },
            {
              "version": "6.12.83",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.113"
            },
            {
              "version": "6.18.24",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18.56"
            },
            {
              "version": "6.1.175",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.2"
            },
            {
              "version": "6.19.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.20"
            },
            {
              "version": "7.0.1",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "7.1"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "7.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "7.1"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.113",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.56",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}