{
  "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-2026-64428",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64428",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T08:51:05.460Z",
    "updatedAt": "2026-08-17T04:55:28.748Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "gpio: sch: use raw_spinlock_t in the irq startup path",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch->lock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -> __setup_irq() ->\nirq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(&sch->lock) edge.  Lockdep reported:\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t.  The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations.  Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f03a15cc73c83740fc355ee22b336492d17b4da"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7a550256d68bbdfa0903ab1c4595c04a6815493a"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a235cec779bb39ec8f961a935b28a2ce278c6c64"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4508366ab7dd0c2917a51a9c2e23cc1b9d35157a"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "41cad91a09d69e8fff4e936db29b1054b4e9f9f7"
            },
            {
              "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.13"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}