{
  "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-2026-97925",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-97925",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-25T10:22:43.552Z",
    "updatedAt": "2026-10-19T09:10:52.214Z",
    "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": "tick/broadcast: Plug clockevents replacement race",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntick/broadcast: Plug clockevents replacement race\n\n朱恺乾 reported and decoded the following race condition when a broadcast\ndevice is replaced:\n\nCPUA\t\t\t\t\tCPUB\n __tick_broadcast_oneshot_control()\n   bc = tick_broadcast_device.evtdev;\n\t\t\t\t\ttick_install_broadcast_device(dev)\n        \t\t\t\tclockevents_exchange_device(cur, dev)\n\t\t\t\t\t   shutdown(cur);\n\t\t\t\t\t   detach(cur);\n\t\t\t\t\t   cur->handler = noop;\n\t\t\t\t\t   tick_broadcast_device.evtdev = dev;\n\n  tick_broadcast_set_event(bc, next_event); <- FAIL: arms a detached device.\n\nIf the original broadcast device has a restricted interrupt affinity mask\nand the last CPU in that mask goes offline then the BUG() in\ntick_cleanup_dead_cpu() triggers because the clockevent device is not in\ndetached state.\n\nThe reason for this is that tick_install_broadcast_device() is not\nserialized vs. tick broadcast operations.\n\nThe obvious cure is to serialize tick_install_broadcast_device() with\ntick_broadcast_lock against a concurrent tick broadcast operation.\n\nThat requires to split clockevents_exchange_device() into two parts, one\nwhich does the exchange, shutdown and detach operation and the other which\ndrops the module reference count. This is required because the module\nreference cannot be dropped while holding tick_broadcast_lock.\n\nLet clockevents_exchange_device() do both operations as before, but let the\nbroadcast device code take the two step approach and do the device\nexchange under tick_broadcast_lock and drop the module reference count\nafter releasing it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "338d6859cd1580617807290f6d7e92b1662d4695"
            },
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "757aa9f548c18b96da1d56d11f65be8188a16d59"
            },
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3da55616db2b6b7d9caa3b7ff1e8983224e0ed52"
            },
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3525b94b2f258e0b99d1ee5a82a80b51bc1cc818"
            },
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "292b7a8ed84032cfdfc9076a690360f7d3f640d4"
            },
            {
              "version": "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98",
              "status": "affected",
              "versionType": "git",
              "lessThan": "113a9796effe3376d2ec5aabcca1fef4fef4cd62"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.21",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.21"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}