{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2b3d942c4878084a37991a65e66512c02b8fa2ad"
            },
            {
              "fixed": "f02980594deef751e42133714aee25228f1494c6"
            },
            {
              "fixed": "e1e7a66584bf0aff3becb73c19fa31527889fc9e"
            },
            {
              "fixed": "a259ba0bce3b192c04334499690372a250f7d0b1"
            },
            {
              "fixed": "f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca"
            },
            {
              "fixed": "bbb09bb89ffa571475f66daca9482b974cd29d6a"
            },
            {
              "fixed": "6ad77458637b78ec655e3da5f112c862e6690a9d"
            },
            {
              "fixed": "8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8"
            },
            {
              "fixed": "e1eabb072c75681f78312c484ccfffb7430f206e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.27"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.169"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.134"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31728.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_ether: Fix race between gether_disconnect and eth_stop\n\nA race condition between gether_disconnect() and eth_stop() leads to a\nNULL pointer dereference. Specifically, if eth_stop() is triggered\nconcurrently while gether_disconnect() is tearing down the endpoints,\neth_stop() attempts to access the cleared endpoint descriptor, causing\nthe following NPE:\n\n  Unable to handle kernel NULL pointer dereference\n  Call trace:\n   __dwc3_gadget_ep_enable+0x60/0x788\n   dwc3_gadget_ep_enable+0x70/0xe4\n   usb_ep_enable+0x60/0x15c\n   eth_stop+0xb8/0x108\n\nBecause eth_stop() crashes while holding the dev-\u003elock, the thread\nrunning gether_disconnect() fails to acquire the same lock and spins\nforever, resulting in a hardlockup:\n\n  Core - Debugging Information for Hardlockup core(7)\n  Call trace:\n   queued_spin_lock_slowpath+0x94/0x488\n   _raw_spin_lock+0x64/0x6c\n   gether_disconnect+0x19c/0x1e8\n   ncm_set_alt+0x68/0x1a0\n   composite_setup+0x6a0/0xc50\n\nThe root cause is that the clearing of dev-\u003eport_usb in\ngether_disconnect() is delayed until the end of the function.\n\nMove the clearing of dev-\u003eport_usb to the very beginning of\ngether_disconnect() while holding dev-\u003elock. This cuts off the link\nimmediately, ensuring eth_stop() will see dev-\u003eport_usb as NULL and\nsafely bail out.",
  "id": "CVE-2026-31728",
  "modified": "2026-07-08T05:36:26.880258055Z",
  "published": "2026-05-01T14:14:28.231Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ad77458637b78ec655e3da5f112c862e6690a9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a259ba0bce3b192c04334499690372a250f7d0b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbb09bb89ffa571475f66daca9482b974cd29d6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1e7a66584bf0aff3becb73c19fa31527889fc9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1eabb072c75681f78312c484ccfffb7430f206e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f02980594deef751e42133714aee25228f1494c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31728.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31728"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "usb: gadget: u_ether: Fix race between gether_disconnect and eth_stop"
}