{
  "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-2026-80727",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80727",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-03T08:21:46.523Z",
    "updatedAt": "2026-09-03T08:21:46.523Z",
    "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": "x86/mce: Set up the polling timer before CMCI discovery",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mce: Set up the polling timer before CMCI discovery\n\nI hit the following on one of my machines:\n\n  mce: CPU0 BANK15 CMCI inherited storm\n  ------------[ cut here ]------------\n  ODEBUG: assert_init not available (active state 0) object: (____ptrval____) object type: timer_list hint: 0x0\n  WARNING: lib/debugobjects.c:632 at debug_object_assert_init+0x178/0x230, CPU#0: swapper/0/0\n  CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc5 #3 PREEMPTLAZY\n  RIP: 0010:debug_object_assert_init+0x18f/0x230\n  Call Trace:\n   <TASK>\n   __mod_timer\n   mce_timer_kick\n   cmci_discover\n   intel_init_cmci\n   mce_intel_feature_init\n   mcheck_cpu_init\n   identify_cpu\n   identify_boot_cpu\n   arch_cpu_finalize_init\n   start_kernel\n\nA second splat follows right after, from timer_setup() finding that same\ntimer already queued:\n\n  ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10\n\nThis is happening because CMCI storm detection is trying to modify the timer\nbefore latter was properly set up.\n\nSet up the timer first. __mcheck_cpu_setup_timer() only calls timer_setup(),\nand depends on neither the generic nor the vendor init.\n\n  [ bp: Massage commit message. ]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17ab68d0cf6a41bff61b1e13c6141d9e463736ae"
            },
            {
              "version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e708fc1566ebd4a2d3f2546e6310d64d362db80d"
            },
            {
              "version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f4cba3947d2f0eceb32727e198ca2c149a653a9"
            },
            {
              "version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a213dfaa2596c1c0dc4dae91c14fbfa499c03223"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.8"
            },
            {
              "version": "6.12.105",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.45",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}