{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0791c0327a6e4e7691d6fc5ad334c215de04dcc9"
            },
            {
              "fixed": "9c46f3ee1837f6881cb99a52ffecb2760f11dc73"
            },
            {
              "fixed": "d90feaa3f74bea8dafb6494631a194c70e547d94"
            },
            {
              "fixed": "54665dce982689e2fd99b32e9a0dcc204fda8a51"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63874.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: usb: fix race between urb completion and rx_retry cancellation\n\nIt's possible that sequencing between setting -\u003estopped and cancelling\nthe rx_retry work (in ndo_stop) could leave us with an urb queued:\n\n    T1: ndo_stop                  T2: rx_retry_work\n    ------------                  ----------------\n                                  LD: -\u003estopped =\u003e false\n    ST: -\u003estopped \u003c= true\n    usb_kill_urb()\n                                  mctp_usb_rx_queue()\n                                    usb_submit_urb()\n    cancel_delayed_work_sync()\n\nThat urb completion can then re-schedule rx_retry_work.\n\nStrenghen the sequencing between the stop (preventing another requeue)\nand the cancel by updating both atomically under a new rx lock. After\nsetting -\u003erx_stopped, and cancelling pending work, we know that the\nrequeue cannot occur, so all that's left is killing any pending urb.",
  "id": "CVE-2026-63874",
  "modified": "2026-07-21T03:42:12.286581083Z",
  "published": "2026-07-19T14:18:41.907Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54665dce982689e2fd99b32e9a0dcc204fda8a51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c46f3ee1837f6881cb99a52ffecb2760f11dc73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d90feaa3f74bea8dafb6494631a194c70e547d94"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63874.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63874"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "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": "net: mctp: usb: fix race between urb completion and rx_retry cancellation"
}