{
  "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-2022-49900",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49900",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-05-01T14:10:46.362Z",
    "updatedAt": "2026-05-11T19:08:53.780Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "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": "i2c: piix4: Fix adapter not be removed in piix4_remove()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: piix4: Fix adapter not be removed in piix4_remove()\n\nIn piix4_probe(), the piix4 adapter will be registered in:\n\n   piix4_probe()\n     piix4_add_adapters_sb800() / piix4_add_adapter()\n       i2c_add_adapter()\n\nBased on the probed device type, piix4_add_adapters_sb800() or single\npiix4_add_adapter() will be called.\nFor the former case, piix4_adapter_count is set as the number of adapters,\nwhile for antoher case it is not set and kept default *zero*.\n\nWhen piix4 is removed, piix4_remove() removes the adapters added in\npiix4_probe(), basing on the piix4_adapter_count value.\nBecause the count is zero for the single adapter case, the adapter won't\nbe removed and makes the sources allocated for adapter leaked, such as\nthe i2c client and device.\n\nThese sources can still be accessed by i2c or bus and cause problems.\nAn easily reproduced case is that if a new adapter is registered, i2c\nwill get the leaked adapter and try to call smbus_algorithm, which was\nalready freed:\n\nTriggered by: rmmod i2c_piix4 && modprobe max31730\n\n BUG: unable to handle page fault for address: ffffffffc053d860\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n Oops: 0000 [#1] PREEMPT SMP KASAN\n CPU: 0 PID: 3752 Comm: modprobe Tainted: G\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n RIP: 0010:i2c_default_probe (drivers/i2c/i2c-core-base.c:2259) i2c_core\n RSP: 0018:ffff888107477710 EFLAGS: 00000246\n ...\n <TASK>\n  i2c_detect (drivers/i2c/i2c-core-base.c:2302) i2c_core\n  __process_new_driver (drivers/i2c/i2c-core-base.c:1336) i2c_core\n  bus_for_each_dev (drivers/base/bus.c:301)\n  i2c_for_each_dev (drivers/i2c/i2c-core-base.c:1823) i2c_core\n  i2c_register_driver (drivers/i2c/i2c-core-base.c:1861) i2c_core\n  do_one_initcall (init/main.c:1296)\n  do_init_module (kernel/module/main.c:2455)\n  ...\n </TASK>\n ---[ end trace 0000000000000000 ]---\n\nFix this problem by correctly set piix4_adapter_count as 1 for the\nsingle adapter so it can be normally removed.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "528d53a1592b0e27c423f7cafc1df85f77fc1163",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bfd5e62f9a7ee214661cb6f143a3b40ccc63317f"
            },
            {
              "version": "528d53a1592b0e27c423f7cafc1df85f77fc1163",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d78ccdce662e88f41e87e90cf2bee63c1715d2a5"
            },
            {
              "version": "528d53a1592b0e27c423f7cafc1df85f77fc1163",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fe51636fffc8108c7c4da6aa393010e786530ad9"
            },
            {
              "version": "528d53a1592b0e27c423f7cafc1df85f77fc1163",
              "status": "affected",
              "versionType": "git",
              "lessThan": "569bea74c94d37785682b11bab76f557520477cd"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.4"
            },
            {
              "version": "5.10.154",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.78",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}