{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bd2d76455b65aab77652823919db128a8e585825"
            },
            {
              "fixed": "4d6270bbb4e083a4d2d39f3c36f30f5c939c06ed"
            },
            {
              "fixed": "3c4b38064937a761ebbf85b1649e812db85eb59e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90432.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Abort directly from the hardlockup handler\n\nscx_hardlockup() defers the abort to an irq_work because exit claiming used\nto take scx_sched_lock and couldn't run from NMI. The deferral is now\nunnecessary - claiming is NMI-safe and asserting -\u003eaborting is exactly what\nbreaks the live-locks that hard-lock CPUs. Call handle_lockup() directly and\ndrop the irq_work. This also makes the self-detected case recoverable: the\nperf watchdog fires on the hard-locked CPU itself, where a queued irq_work\nnever runs with IRQs off.\n\nAlso fix the return value: %true used to be returned whenever sched_ext was\nloaded, suppressing the kernel's hardlockup report even when the abort was\nrefused. Return %true only when this call initiated the abort.",
  "id": "CVE-2026-90432",
  "modified": "2026-09-19T03:30:34.882349267Z",
  "published": "2026-09-17T16:09:52.429Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c4b38064937a761ebbf85b1649e812db85eb59e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d6270bbb4e083a4d2d39f3c36f30f5c939c06ed"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90432.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90432"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "sched_ext: Abort directly from the hardlockup handler"
}