{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c541d7b5e17987ed330798b07d4ad508859c1c93"
            },
            {
              "fixed": "559e4d2b6f83aaa96061659cc7104b7a0293f9ef"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "168e28305b871d8ec604a8f51f35467b8d7ba05b"
            },
            {
              "fixed": "90b744066ca520d1a6a505a11ade9c9a5f48accf"
            },
            {
              "fixed": "79993e9919a87068183ba3622c383f05c049c4bc"
            },
            {
              "fixed": "555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.6"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "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": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99013.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Reject concurrent BIS listener setup\n\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev-\u003elock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)-\u003econn, leaking the connA reference and leaving\nconnA-\u003esk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\n\nRecheck BT_BOUND and require iso_pi(sk)-\u003econn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\n\nA recorded KASAN report from an instrumented kernel shows:\n\n  BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\n  Call Trace:\n   iso_sock_hold+0x119/0x1f0\n   iso_conn_del+0xe4/0x270\n   hci_disconn_complete_evt+0x351/0x8c0\n   hci_event_packet+0x71b/0xb20\n   hci_rx_work+0x293/0x730\n\n  Allocated by task 93:\n   sk_prot_alloc+0x113/0x220\n   sk_alloc+0x2b/0x6d0\n   bt_sock_alloc+0x29/0x370\n   iso_sock_alloc.constprop.0+0x19/0x300\n   iso_sock_create+0x94/0x100\n\n  Freed by task 93:\n   kfree+0x121/0x3c0\n   __sk_destruct+0x42b/0x540\n   iso_sock_release+0x29d/0x340\n   __sock_release+0xa1/0x260\n   sock_close+0x10/0x20",
  "id": "CVE-2026-99013",
  "modified": "2026-10-28T02:31:11.412212228Z",
  "published": "2026-10-23T12:20:38.612Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99013.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99013"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Bluetooth: ISO: Reject concurrent BIS listener setup"
}