{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4db52602a6074e9cc523500b8304600ff63e7b85"
            },
            {
              "fixed": "8e872c07e40d51a66dee7b280a23a460a2e1e3fa"
            },
            {
              "fixed": "ed7d5599e6c398da74845767cd1e6a8370a160fc"
            },
            {
              "fixed": "7f2d6b31089e48db4653df832c9a6afdde9a1c29"
            },
            {
              "fixed": "a3a8afa2f6e7f0dc266d08f02be3f3054241ba47"
            },
            {
              "fixed": "a26b499b757cfc8bbff1088bb1b844639e250893"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64474.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc\n\nvfio_mig_get_next_state() walks vfio_from_fsm_table[] one step at a time,\nlooping to skip optional states the device does not support until\n*next_fsm is supported. A blocked transition is encoded as\nVFIO_DEVICE_STATE_ERROR, which the trailing return reports as -EINVAL.\n\nThe skip loop does not account for the ERROR sentinel.\nstate_flags_table[ERROR] is ~0U and vfio_from_fsm_table[ERROR][*] is\nERROR, so once *next_fsm becomes ERROR the loop condition stays true and\n*next_fsm never changes. The blocked arcs STOP_COPY -\u003e PRE_COPY and\nSTOP_COPY -\u003e PRE_COPY_P2P map to ERROR yet pass the support check on a\nprecopy-capable device, causing the loop to spin forever while holding\nthe driver state mutex. This can result in a soft lockup, and a panic\nwith softlockup_panic set.\n\nTerminate the skip loop on the ERROR sentinel so a blocked transition\nfalls through to the existing return and reports -EINVAL.",
  "id": "CVE-2026-64474",
  "modified": "2026-07-27T03:56:39.581261572Z",
  "published": "2026-07-25T08:51:37.405Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f2d6b31089e48db4653df832c9a6afdde9a1c29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e872c07e40d51a66dee7b280a23a460a2e1e3fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a26b499b757cfc8bbff1088bb1b844639e250893"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3a8afa2f6e7f0dc266d08f02be3f3054241ba47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed7d5599e6c398da74845767cd1e6a8370a160fc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64474.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64474"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "vfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc"
}