{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "26afbd826ee326e63a334c37fd45e82e50a615ec"
            },
            {
              "fixed": "d6d709981208567868c5c01ebd1bec5e5e7fdab0"
            },
            {
              "fixed": "708cdd203d0bbcf9255fffb2e4c308d5b28851a7"
            },
            {
              "fixed": "a7161730a3ab3f0a3896000db7ab0284683936e6"
            },
            {
              "fixed": "1a572db43c057566771b485598ad2e66cb390821"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98733.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Serialize fragmented ISO packet queueing\n\nThe fragmented path in hci_queue_iso() calls __skb_queue_tail() without\nholding conn-\u003edata_q.lock. The socket lock serializes senders, but the\ntransmit worker can concurrently remove packets from this queue using\nskb_dequeue().\n\nAfter an insertion saves the old tail pointer, hci_sched_iso() can dequeue\nthat packet and pass it to the driver. The driver can free the packet\nbefore the insertion resumes and writes to the old tail's next pointer,\ncausing a use-after-free. Concurrent updates can also corrupt the queue.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in hci_send_iso+0xc7d/0xe10\n  Call Trace:\n   hci_send_iso+0xc7d/0xe10\n   iso_sock_sendmsg+0x710/0x900\n   __sys_sendto+0x34a/0x3a0\n\n  Allocated by task 86:\n   __alloc_skb+0xdd/0x820\n   alloc_skb_with_frags+0x7e/0x770\n   sock_alloc_send_pskb+0x67a/0x820\n   bt_skb_sendmsg.constprop.0+0xc0/0x6c0\n   iso_sock_sendmsg+0x44e/0x900\n\n  Freed by task 90:\n   kmem_cache_free+0xcb/0x3d0\n   vhci_read+0x33f/0x4d0\n   vfs_read+0x177/0xa20\n\nHold the queue lock across the entire fragment batch, as hci_queue_acl()\ndoes, to serialize insertion against dequeue while preserving fragment\nordering.",
  "id": "CVE-2026-98733",
  "modified": "2026-10-20T02:30:15.381159644Z",
  "published": "2026-10-18T15:47:11.210Z",
  "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/1a572db43c057566771b485598ad2e66cb390821"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/708cdd203d0bbcf9255fffb2e4c308d5b28851a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7161730a3ab3f0a3896000db7ab0284683936e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6d709981208567868c5c01ebd1bec5e5e7fdab0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98733.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98733"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: hci_core: Serialize fragmented ISO packet queueing"
}