{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "472d900c8bcac301ae0e40fdca7db799bd989ff5"
            },
            {
              "fixed": "76390ac0bca7e5058b7482eb4d951c3bda5df812"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "179ef1127d7a4f09f0e741fa9f30b8a8e7886271"
            },
            {
              "fixed": "c0071ee496e1228976c72b096f529503222708a0"
            },
            {
              "fixed": "7efa1a1953cd6b20b23a3524d5b4b81789c6ef25"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.18.6"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99050.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: mpsse: fix race when arming the IRQ poll worker\n\ngpio_mpsse_irq_enable() arms the poll worker before publishing it:\nschedule_work() runs before the worker is added to priv-\u003eworkers. If\ngpio_mpsse_disconnect() walks the list in that window it misses the\nworker, and once disconnect returns, the USB core frees mpsse_priv\nwhile the orphaned gpio_mpsse_poll() work keeps accessing it, causing\na use-after-free.\n\nFix this by publishing and arming the worker in one irq_spin\ncritical section. Teardown walks the same list under irq_spin, so a\nworker found on the list is guaranteed to be armed, and\ncancel_work_sync() handles it whether it is queued or running.\n\nA worker armed after the disconnect walk would still be missed, so\nalso set a new priv-\u003edying flag under irq_spin before the teardown\nwalk, and check it in the same critical section, freeing it via\nkfree_rcu() instead when the device is going away, since kfree()\nwould be called with the IRQ core's raw spinlock held and may sleep\non PREEMPT_RT. schedule_work() is safe to call with irq_spin held,\nand the next probe gets a fresh mpsse_priv, so the flag never needs\nto be cleared.\n\nThis issue was found by an in-house static analysis tool.",
  "id": "CVE-2026-99050",
  "modified": "2026-10-28T02:30:40.509520774Z",
  "published": "2026-10-23T12:22:29.204Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76390ac0bca7e5058b7482eb4d951c3bda5df812"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7efa1a1953cd6b20b23a3524d5b4b81789c6ef25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0071ee496e1228976c72b096f529503222708a0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99050.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99050"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "gpio: mpsse: fix race when arming the IRQ poll worker"
}