{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "efed421a94e62a7ddbc76acba4312b70e4be958f"
            },
            {
              "fixed": "1a1d7158420df6b8fa1efc0cdd6ab704801a4fc8"
            },
            {
              "fixed": "f6fc21ec7ccd83726ba766d73d0b8cc03e726475"
            },
            {
              "fixed": "dcf3e2f164435b5844706cb8eefef29ebee0eedb"
            },
            {
              "fixed": "d4964a74717107697999f48bcb4e80a9c0679a27"
            },
            {
              "fixed": "0583f2fbf8f86ae3a0ce054f96783dd83e65d9bb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.19.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64583.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown\n\nThe Broadcom BDC UDC driver registers its IRQ handler with\ndevm_request_irq() in bdc_udc_init(), so the IRQ is released by devm\nonly after bdc_remove() returns.  devm releases resources in reverse\nLIFO order, but bdc_remove() runs bdc_udc_exit() and bdc_hw_exit() -\u003e\nbdc_mem_free() manually before returning: bdc_udc_exit() tears down\nindividual endpoint objects via bdc_free_ep(), while bdc_hw_exit() -\u003e\nbdc_mem_free() frees and NULLs the DMA-coherent status-report ring\n(bdc-\u003esrr.sr_bds) and kfree()s bdc-\u003ebdc_ep_array.  Both happen while\nthe IRQ handler (bdc_udc_interrupt, requested with IRQF_SHARED)\nremains deliverable in the window up to the post-remove devm\nfree_irq().\n\nOn receipt of a shared interrupt in that window, bdc_udc_interrupt()\ndereferences bdc-\u003esrr.sr_bds[bdc-\u003esrr.dqp_index] (NULL or freed DMA)\nand dispatches sr_handler callbacks that index into bdc_ep_array,\ncausing a NULL-deref or use-after-free.\n\nThe same window affects the delayed_work bdc-\u003efunc_wake_notify, which is\narmed from the IRQ handler via bdc_sr_uspc() -\u003e handle_link_state_change()\n-\u003e schedule_delayed_work() and may self-rearm from its own callback\nbdc_func_wake_timer().  No cancel exists anywhere in the driver, so a\nqueued work item that fires after bdc_remove() returns and the bdc\nstructure is devm-freed dereferences freed memory.\n\nReplace devm_request_irq() with request_irq() and add an explicit\nfree_irq(bdc-\u003eirq, bdc) in bdc_remove().  Clear BDC_GIE before\nfree_irq() to stop the device from asserting interrupts, then\nfree_irq() drains any in-flight handler, then cancel_delayed_work_sync()\ndrains the func_wake_notify delayed work.  This ordering ensures the\nIRQ handler and delayed work cannot interfere with the subsequent\nendpoint and DMA teardown in bdc_udc_exit() and bdc_hw_exit().  Wire the\nmatching free_irq() into the bdc_udc_init() error path so the IRQ is\nreleased on probe failure, and route the bdc_init_ep() failure through\nerr0 instead of returning directly.\n\nThis issue was found by an in-house static analysis tool.",
  "id": "CVE-2026-64583",
  "modified": "2026-08-08T03:30:20.424639395Z",
  "published": "2026-08-06T07:06:25.335Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0583f2fbf8f86ae3a0ce054f96783dd83e65d9bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a1d7158420df6b8fa1efc0cdd6ab704801a4fc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4964a74717107697999f48bcb4e80a9c0679a27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcf3e2f164435b5844706cb8eefef29ebee0eedb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6fc21ec7ccd83726ba766d73d0b8cc03e726475"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64583.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64583"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "usb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown"
}