{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "626535077ba9dc110787540d1fe24881094c15a1"
            },
            {
              "fixed": "9f407d52c0d881430d689836d3e7d32aa36f98b5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "b938790e70540bf4f2e653dcd74b232494d06c8f"
            },
            {
              "fixed": "560ed4373c06a58123ecdf9ad5ecaddc87a73382"
            },
            {
              "fixed": "1ee0c5429dc4a92879bda2554b1bfd4abc6c587c"
            },
            {
              "fixed": "4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00"
            },
            {
              "fixed": "1276c2fafd18499769a28f96f45c5a76d6fc990e"
            },
            {
              "fixed": "9a10987a2f160a44a638c9a35994ca6e3089696e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.57"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.5.7"
            },
            {
              "fixed": "6.6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.6.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98246.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Serialize local codec list cleanup\n\nhci_dev_close_sync() clears hdev-\u003elocal_codecs after releasing hdev-\u003elock.\nCodec list additions and both traversals in sco_sock_getsockopt() use that\nlock, but the close path does not. A close and BT_CODEC query can therefore\ninterleave as follows:\n\n  hci_dev_close_sync()          sco_sock_getsockopt()\n                                hci_dev_lock()\n                                fetch codec entry\n  hci_codec_list_clear()\n    kfree(entry)\n                                read entry-\u003eid\n\nThe reader then accesses an entry which the close path has freed. KASAN\n\n  BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0\n  Read of size 1 at addr ffff8881001c3450\n  Call Trace:\n   sco_sock_getsockopt+0xfa0/0xfe0\n   do_sock_getsockopt+0x537/0x7b0\n   __sys_getsockopt+0xf2/0x170\n  Allocated by task 92:\n   hci_codec_list_add.isra.0+0x2c/0x440\n   hci_read_codec_capabilities+0x224/0x590\n   hci_read_supported_codecs+0x2c2/0x640\n  Freed by task 92:\n   kfree+0x131/0x3c0\n   hci_codec_list_clear+0xd8/0x160\n   hci_dev_close_sync+0x92a/0xfa0\n\nTake hdev-\u003elock around the clear operation at its existing point in the\nclose path. This makes the clear wait for active readers and prevents a new\ntraversal until the list is empty without changing teardown ordering.",
  "id": "CVE-2026-98246",
  "modified": "2026-10-07T02:30:37.690721259Z",
  "published": "2026-10-06T08:45:15.411Z",
  "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/1276c2fafd18499769a28f96f45c5a76d6fc990e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98246.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98246"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: hci_sync: Serialize local codec list cleanup"
}