{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854"
            },
            {
              "fixed": "524e0450dd9a396f99a81b045219b0e2ea0dab57"
            },
            {
              "fixed": "8ddf962c76432a10a6cb80042875cbc48a9c056b"
            },
            {
              "fixed": "416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"
            },
            {
              "fixed": "2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"
            },
            {
              "fixed": "b5dbb41b212c50c095a4dbee3017a84fe94f033b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.17.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98456.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device flags again while filling it.\n\nhci_dev_list_lock stabilizes list membership, but it does not serialize the\nper-device flags. During asynchronous controller setup, the worker can set\nHCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller\nomitted from the allocation count can then become eligible for the fill\npass, causing an out-of-bounds write to rp-\u003eindex[].\n\nAllocate space for every device on hci_dev_list. Since list membership\ncannot change while hci_dev_list_lock is held, the response remains large\nenough regardless of flag transitions. The reported count and response\nlength still include only eligible unconfigured controllers.",
  "id": "CVE-2026-98456",
  "modified": "2026-10-20T02:30:31.349252209Z",
  "published": "2026-10-18T15:15:05.909Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98456.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98456"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: mgmt: fix race in read_unconf_index_list()"
}